Exhibit 99.1

GIBSON, DUNN & CRUTCHER LLP

200 Park Avenue

New York, NY 10166-0193

(212) 351-4000

Matthew J. Williams

Keith R. Martorana

Attorneys for the Motors Liquidation Company GUC Trust

UNITED STATES BANKRUPTCY COURT

SOUTHERN DISTRICT OF NEW YORK

MOTORS LIQUIDATION COMPANY GUC TRUST

QUARTERLY SECTION 6.2(C) REPORT AND

BUDGET VARIANCE REPORT AS OF DECEMBER 31, 2017

The Motors Liquidation Company GUC Trust (the “GUC Trust”), by its undersigned counsel, pursuant to the Second Amended and Restated Motors Liquidation Company GUC Trust Agreement dated July 30, 2015 and between the parties thereto (as amended, the “GUC Trust Agreement”) and in accordance with Paragraph 31 of the order of this Court dated March 29, 2011 confirming the Debtors’ Second Amended Joint Chapter 11 Plan of liquidation dated March 18, 2011 of Motors Liquidation Company and its affiliated post-effective date debtors (the “Confirmation Order”), hereby files the following for the most recently ended fiscal quarter of the GUC Trust.

Reporting required under Section 6.2(c)(i) of the GUC Trust Agreement is annexed hereto as Exhibit A (the “6.2(c) Report”).

The quarterly variance report as described in the third sentence of Section 6.4 of the GUC Trust Agreement for the fiscal quarter ended December 31, 2017, in accordance with the Order Authorizing the GUC Trust Administrator to Liquidate New GM Securities for the Purpose of Funding Fees, Costs and Expenses of the GUC Trust and the Avoidance Action Trust, dated March 8, 2012, is annexed hereto as Exhibit B (the “Budget Variance Report”).

The 6.2(c) Report is not intended to constitute, and should not be construed as, investment advice. The 6.2(c) Report has been provided to comply with the GUC Trust Agreement and the Confirmation Order and for informational purposes only and may not be relied upon to evaluate the merits of investing in any securities or interests referred to herein.

The GUC Trust has no officers, directors or employees. The GUC Trust and Wilmington Trust Company, solely in its capacity as trustee and trust administrator (the “GUC Trust Administrator”), rely solely on receiving accurate information, reports and other representations from GUC Trust professionals and other service providers to the GUC Trust. In submitting the 6.2(c) Report, the Budget Variance Report and executing any related documentation on behalf of the GUC Trust, the GUC Trust Administrator has relied upon the accuracy of such reports, information and representations.

Dated: New York, New York

   January 26, 2018

EXHIBIT A

Motors Liquidation Company GUC Trust

Claims and Distribution Summary

1 of 2

Motors Liquidation Company GUC Trust

Claims and Distribution Summary

2 of 2

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

During the quarter ended September 30, 2016, certain Unresolved Term Loan Avoidance Action Claims were allowed, and the GUC Trust made a distribution of approximately $38,335 to holders of such claims. In addition, as of September 30, 2016, the amount of Excess GUC Trust Distributable Assets exceeded the Distribution Threshold, primarily as a result of a release of distributable assets of the GUC Trust that were previously set aside in respect of potential Taxes on Distribution. Accordingly, the GUC Trust made a distribution of Excess GUC Trust Distributable Assets to holders of Units on or about November 14, 2016, consisting of $112,222,803 in cash (inclusive of cash previously received by the GUC Trust in the form of dividends on New GM Common Stock (“Dividend Assets”)).

During the quarter ended December 31, 2016, certain Unresolved Term Loan Avoidance Action Claims were allowed, and the GUC Trust made a distribution of approximately $27,488 to holders of such claims. Because the amount of Excess GUC Trust Distributable Assets did not exceed the Distribution Threshold for the quarter ended December 31, 2016, no distribution to holders of Units was made in respect of such quarter.

During the quarter ended March 31, 2017, certain Unresolved Term Loan Avoidance Action Claims were allowed, and the GUC Trust made a distribution of approximately $13,750 to holders of such claims. Because the amount of Excess GUC Trust Distributable Assets did not exceed the Distribution Threshold for the quarter ended March 31, 2017, no distribution to holders of Units was made in respect of such quarter.

During the quarter ended June 30, 2017, certain Unresolved Term Loan Avoidance Action Claims were allowed, and the GUC Trust made a distribution of approximately $400,145 to holders of such claims. Because the amount of Excess GUC Trust Distributable Assets did not exceed the Distribution Threshold for the quarter ended June 30, 2017, no distribution to holders of Units was made in respect of such quarter.

During the quarter ended September 30, 2017, no Unresolved Term Loan Avoidance Action Claims were allowed, and thus the GUC Trust was not required to distribute any assets to holders of such claims. In addition, because the amount of Excess GUC Trust Distributable Assets did not exceed the Distribution Threshold for the quarter ended September 30, 2017, no distribution to holders of Units was required to be made in respect of such quarter.

During the quarter ended December 31, 2017, certain Unresolved Term Loan Avoidance Action Claims were allowed, and the GUC Trust is required to distribute approximately $15,076 to holders of such claims. In addition, because the amount of Excess GUC Trust Distributable Assets did not exceed the Distribution Threshold for the quarter ended December 31, 2017, no distribution to holders of Units is required to be made in respect of such quarter.

1

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

On June 3, 2015, the GUC Trust Administrator filed a motion (the “Liquidation Motion”) with the Bankruptcy Court seeking an order authorizing the GUC Trust Administrator to exercise and/or liquidate the GUC Trust’s holdings of New GM Warrants and New GM Common Stock. On July 2, 2015, the Bankruptcy Court entered an order granting the relief requested in the Liquidation Motion (the “Liquidation Order”). Following entry of the Liquidation Order, and in compliance therewith, the GUC Trust Administrator exercised all of the New GM Warrants then held by the GUC Trust using a cashless exercise feature, and then liquidated all of its holdings of New GM Common Stock (including the proceeds of the exercised New GM Warrants) for cash (the proceeds thereof “GUC Trust Cash”).

As of the quarter ended December 31, 2017, but prior to current quarter activity and post-closing adjustments, the GUC Trust’s Distributable Assets consisted solely of $465,348,580 in cash and marketable securities ($452,428,010 of which represents the proceeds of the liquidated New GM Securities that were categorized as GUC Trust Distributable Assets, and $12,920,570 of which represents Dividend Assets).

The following table summarizes the changes in the cash and marketable securities that comprise the GUC Trust’s “Distributable Assets as of December 31, 2017 (prior to current quarter activity)” to the “Cumulative total including current quarter activity and post-closing adjustments”.

2

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

Reconciliation of GUC Trust Distributable Assets per 6.2(c) report

Units are issued at a ratio of one Unit for each $1,000 in amount of allowed general unsecured claims, such that if all Disputed General Unsecured Claims and potential Term Loan Avoidance Action Claims as of December 31, 2017 were subsequently allowed, the GUC Trust would issue approximately 33.4 million Units (inclusive of all Units previously distributed). Units in respect of general unsecured claims allowed as of the Initial Distribution were not issued until after the Effective Date. Hence, for purposes of this presentation only, Units outstanding as of the Effective Date are deemed to be zero. The

3

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

In addition to the initial funding of the Reporting and Transfer Costs as described above, the GUC Trust Agreement (together with the Liquidation Order) affords the GUC Trust Administrator, with the approval of the GUC Trust Monitor, the discretion and authority to set aside from distribution GUC Trust Cash (including Dividend Assets) in amounts sufficient to satisfy (i) any current or projected fees, costs and expenses (including certain tax obligations and administrative costs) of the GUC Trust (the “Wind-Down Costs”) that were not budgeted or exceed the amounts budgeted for use from the funds contributed by MLC on the Effective Date of the Plan for purposes of satisfying such Wind-Down Costs, (ii) any current or projected Reporting and Transfer Costs that exceed the then currently available funds, or (iii) any current or projected income tax liabilities of the GUC Trust arising from the disposition of New GM Securities (“Taxes on Distribution”). This process is not related to, and is separate from, the process of recognizing any current and deferred income tax liabilities, as well as reserves for expected costs of liquidation in the Statement of Net Assets in Liquidation, as a matter of financial reporting. Such liabilities and reserves must be determined in accordance with generally accepted accounting principles applicable to the GUC Trust. By contrast, the estimates of projected costs and potential liabilities for which the GUC Trust may set aside GUC Trust Cash (including Dividend Assets) are generally made on a more conservative (i.e., more inclusive) basis over the duration of the GUC Trust and include contingencies and amounts of potential income tax liabilities that are not permitted to be recognized under applicable accounting standards. The GUC Trust Administrator may use GUC Trust Cash (including Dividend Assets) that has been set aside from distribution to fund (with the required approval of the Bankruptcy Court) the current or projected Wind-Down Costs or Reporting and Transfer Costs of the GUC Trust and (with the required approval of the GUC Trust Monitor) current and potential Taxes on Distribution.

Beginning in the fiscal quarter ended December 2011, the GUC Trust Administrator set aside from distribution, in accordance with Sections 6.1(b), 6.1(c), and 6.1(d) of the GUC Trust Agreement and with the approval of the GUC Trust Monitor, New GM Securities and/or GUC Trust Cash, as applicable, in amounts that the GUC Trust Administrator determined was necessary to satisfy then current and projected Wind-Down Costs and Reporting and Transfer

4

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

Costs and potential Taxes on Distribution of the GUC Trust. Because the GUC Trust Administrator reevaluated (and continues to reevaluate) the projected Wind-Down Costs and Reporting and Transfer Costs and the potential Taxes on Distribution of the GUC Trust on a quarterly basis, the amount of set aside GUC Trust Cash (or, when applicable in prior quarters, New GM Securities) necessarily fluctuates over time.

While the GUC Trust has employed various methodologies for calculating the set asides associated with Wind-Down Costs and Reporting and Transfer Costs (the “Administrative Costs Set Aside Methodology”) and potential Taxes on Distribution (the “Taxes on Distribution Set Aside Methodology”), during the periods presented in the accompanying section 6.2(c) Report such set asides were calculated in the following manner (for further information on prior periods, please see the prior section 6.2(c) Reports available at the Motors Liquidation Company GUC Trust website at https://www.mlcguctrust.com/):

In March 2012, December 2012, and January 2015, the GUC Trust Administrator sought and received authority from the Bankruptcy Court to liquidate set aside New GM Securities (and use associated Dividend Assets) for the purposes of funding then current and projected Wind-Down Costs and Reporting and Transfer Costs for the calendar years 2011 through 2015, as well as certain fees, costs and expenses of the Avoidance Action Trust (“Avoidance Action Trust Administrative Costs”) estimated for the calendar years 2012, 2013 and 2014 (collectively, the “Initial Cost Funding Orders”). In the aggregate, pursuant to the Initial Cost Funding Orders, the GUC Trust liquidated (i) 640,855 shares of New GM Common Stock and 582,580 warrants of each class of warrant for the aggregate proceeds of $37,670,068 (including $123,160 of associated Dividend Assets) in respect of Wind-Down Costs; (ii) 315,764 shares of New GM Common Stock and 287,051 warrants of each class of warrant for the aggregate proceeds of $18,354,464 (including $46,728 of associated Dividend Assets) in respect of Reporting and Transfer Costs; and (iii) 269,422 shares of New GM Common Stock and 244,929 warrants of each class of warrant for the aggregate proceeds of $13,715,264 in respect of Avoidance Action Trust Administrative Costs (which amount was subsequently transferred to the Avoidance Action Trust). Copies of the Initial Cost Funding Orders are available at the Motors Liquidation Company GUC Trust website at https://www.mlcguctrust.com/.

On November 17, 2015, the GUC Trust Administrator filed a motion seeking authority from the Bankruptcy Court to reallocate certain set aside GUC Trust Cash for use in funding projected Wind-Down Costs and Reporting and Transfer Costs for the calendar year 2016 (the “2016 Reallocation Motion”). In the aggregate, the 2016 Reallocation Motion sought authority to reallocate $7,518,800 in GUC Trust Cash for the purposes of satisfying projected Wind-Down Costs and $4,528,000 for the purposes of satisfying projected Reporting and Transfer Costs. On December 7, 2015, the Bankruptcy Court entered an order authorizing the 2016 Reallocation Motion (the “2016 Reallocation Order”). Copies of the 2016 Reallocation Motion and 2016 Reallocation Order are available at the Motors Liquidation Company GUC Trust website at https://www.mlcguctrust.com/.

5

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

As of September 30, 2016, the GUC Trust had set aside from distribution $41,419,984 to fund projected Wind-Down Costs and Reporting and Transfer Costs. In addition, the GUC Trust Administrator reviewed the potential Taxes on Distribution and, as a result of such review, determined that no GUC Trust Cash should be set aside for potential Taxes on Distribution. Such determination was based on the fact that, as a result of the application of Section 505(b) of the Bankruptcy Code, the GUC Trust’s federal income tax returns for the year ended March 31, 2016, and all prior years, were no longer subject to examination and thus no Taxes on Distribution may be assessed for the year ended March 31, 2016, and all prior years. In addition, as a result of the liquidation of all then remaining New GM Securities during the year ended March 31, 2016, no Taxes on Distribution were expected to be paid in the future.

As of December 31, 2016, the GUC Trust had set aside from distribution $47,354,688 to fund projected Wind-Down Costs and Reporting and Transfer Costs. The increase in such set aside GUC Trust Cash from the prior quarter was due primarily to an assessment by the GUC Trust Administrator that the costs associated with defending the Term Loan Avoidance Action against the Avoidance Action Trust (“Avoidance Action Defense Costs”) were likely to exceed the cash designated as “Residual Wind Down Assets” which was initially funded by the U.S. Department of Treasury and the Governments of Canada and Ontario (through Export Development Canada), which cash was specifically set aside for payment of Avoidance Action Defense Costs and other administrative expense claims asserted against the GUC Trust. Pursuant to the Plan and the GUC Trust Agreement, the GUC Trust Administrator has the authority, with the approval of the GUC Trust Monitor, to set aside (and with the approval of the Bankruptcy Court) appropriate GUC Trust Cash in an amount necessary to fund potential Avoidance Action Defense Costs that exceed the Residual Wind Down Assets then held by the GUC Trust. For further information concerning Avoidance Action Defense Costs and the GUC Trust’s obligation to satisfy such costs, see the Form 10-Q for the quarter ended September 30, 2017 filed by the GUC Trust on November 13, 2017, and available at the Motors Liquidation Company GUC Trust website at https://www.mlcguctrust.com/.

On January 20, 2017, the GUC Trust Administrator filed a motion seeking authority from the Bankruptcy Court to reallocate certain set aside GUC Trust Cash for use in funding projected Wind-Down Costs and Reporting and Transfer Costs for the calendar year 2017 (the “2017 Reallocation Motion”). In the aggregate, the 2017 Reallocation Motion sought authority to reallocate $4,970,600 in GUC Trust Cash for the purposes of satisfying projected Wind-Down Costs and $4,961,400 for the purposes of satisfying projected Reporting and Transfer Costs. The 2017 Reallocation Motion did not seek authority to reallocate any GUC Trust Cash associated with potential Avoidance Action Defense Costs. On February 21, 2017, the Bankruptcy Court entered an order authorizing the 2017 Reallocation Motion (the “2017 Reallocation Order”). Copies of the 2017 Reallocation Motion and 2017 Reallocation Order are available at the Motors Liquidation Company GUC Trust website at https://www.mlcguctrust.com/.

As of March 31, 2017, the GUC Trust had set aside from distribution $29,776,200 to fund projected Wind-Down Costs and Reporting and Transfer Costs. During the three months ended March 31, 2017, the GUC Trust Administrator determined to reverse the set aside associated with the potential Avoidance Action Defense Costs that was made in the quarter ended December 31, 2016. The reversal followed directly from the April 18, 2017 execution of a letter agreement (the “Avoidance Action Defense Costs Letter Agreement”) by and between the GUC Trust Administrator and the Term Loan Agent. The Avoidance Action Defense Costs Letter Agreement had the effect of, among other things, capping the GUC Trust’s obligation to fund Avoidance Action Defense Costs in an amount that does not exceed the Residual Wind Down Assets then held by the GUC Trust, until such time, if any, as the Term Loan Avoidance Action is fully and finally resolved by court order or settlement, which court order or settlement satisfies certain conditions as set forth in the Avoidance Action Defense Costs Letter Agreement. Copies of the Avoidance Action Defense Costs Letter Agreement are available at the Motors Liquidation Company GUC Trust website at https://www.mlcguctrust.com/.

6

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

As of June 30, 2017, the GUC Trust had set aside from distribution $30,127,700 to fund projected Wind-Down Costs and Reporting and Transfer Costs.

As of September 30, 2017, the GUC Trust had set aside from distribution $30,956,946 to fund projected Wind-Down Costs and Reporting and Transfer Costs.

During the three months ended December 31, 2017, the amount of GUC Trust Cash set aside from distribution to fund projected Wind-Down Costs and Reporting and Transfer Costs of the GUC Trust increased by $6,899,414 from the cash set aside as of September 30, 2017, with the total amount of such set aside cash aggregating $37,856,360 as of December 31, 2017. Such increase was due primarily to increases in expected legal fees related to litigation associated with New GM product recalls.

During all periods presented in the accompanying section 6.2(c) Report, other than for the quarter ended December 31, 2016, the amount of GUC Trust Cash (including Dividend Assets) set aside from distribution to fund projected Wind-Down Costs, Reporting and Transfer Costs and potential Taxes on Distribution was sufficient to satisfy such projected costs and potential taxes as estimated by the GUC Trust in accordance with the above detailed Administrative Costs Set Aside Methodology and the Taxes on Distribution Set Aside Methodology. For the quarter ended December 31, 2016, however, as a result of limitations on the amount of GUC Trust Cash available to be set aside for such purposes, the amount of GUC Trust Cash available to be set aside from distribution to fund projected Wind-Down Costs (including Avoidance Action Defense Costs) as of December 31, 2016 was only $47,354,688, for a net shortfall of $853,257 from projected costs. Accordingly, as of December 31, 2016, the set asides for potential Wind-Down Costs (including Avoidance Action Defense Costs) was insufficient to satisfy in full the Administrative Costs Set Aside Methodology. For the quarter ended March 31, 2017, following the reversal of the set aside associated with the potential Avoidance Action Defense Costs, the amount of GUC Trust Cash (including Dividend Assets) set aside from distribution to fund projected Wind-Down Costs, Reporting and Transfer Costs and potential Taxes on Distribution was once again sufficient to satisfy such projected costs and potential taxes as estimated by the GUC Trust in accordance with the above detailed Administrative Costs Set Aside Methodology and the Taxes on Distribution Set Aside Methodology.

It is the view of the GUC Trust Administrator, after consultation with the GUC Trust Monitor and Trust Professionals, that the Administrative Costs Set Aside Methodology is a generally conservative methodology for calculating the projected administrative costs of the GUC Trust. Accordingly, it is the view of the GUC Trust Administrator and the GUC Trust Monitor that the cash currently held in the set asides for Wind-Down Costs and Reporting and Transfer Costs would be sufficient to satisfy the administrative and reporting costs of the GUC Trust as of the date of this report. However, there can be no assurance that the cash set aside to fund projected Wind-Down Costs and Reporting and Transfer Costs will be sufficient to fund such costs and liabilities as they are actually incurred. In addition, there can be no assurance that, as a result of future evaluations, additional amounts of cash will not need to be set aside or utilized to fund additional costs and liabilities, beyond those that are currently included in the GUC Trust’s estimates.

7

Motors Liquidation Company GUC Trust

Notes to Claims and Distribution Summary – Section 6.2(c) Report

December 31, 2017

During all periods presented in the accompanying section 6.2(c) Report, the GUC Trust Administrator included in the set aside for Wind-Down Costs an amount of GUC Trust Cash (including Dividend Assets) that would be sufficient upon reallocation, in the GUC Trust Administrator’s estimation, to satisfy Dividend Taxes relating to the then Current Dividends.

As described in footnote (1) above, no distributions to holders of Units were made in any quarter where the amount of Excess GUC Trust Distributable Assets did not exceed the Distribution Threshold. Undistributed Excess GUC Trust Distributable Assets are reported in section H as Excess GUC Trust Distributable Assets set aside for distribution to holders of Units and will be held by the GUC Trust until the next calendar quarter for which the amount of Excess GUC Trust Distributable Assets exceeds the Distribution Threshold.

8

EXHIBIT B

MLC GUC Trust

Wind-Down

Actual vs. Approved Budget Report

($ in thousands)

(1) Reflective of expenses incurred and accrued for work performed during the 3 months ended December 31, 2017. Excludes any true-up from reversal of prior quarter accruals.

(2) Per 8-K filed December 1, 2016