This may be of limited value but here are some Library of Congress lookup details for CCKW TBs/TMs The date at the end is the date entered into the LoC.
Trucks, 6x6 and 6x4 (all Makes): Adjustment and Lubrication of Roller Bearing Type Trunnion Axle Spring Seat Bearings, 2 pages.
PB 86617 - BSIR 9(4):318; 04/23/48
Truck, 2 1/2 ton, 6x6, (GMC CCKW-352, CCKW-353): Lubrication Instructions, 2 pages.
PB 86619 - BSIR 9(4):318; 04/23/48
Unit Replacement and Repair Time Guide for Wheeled Vehicles, 147 pages.
PB 36930 - BSIR 3(9):666; 11/29/46
Truck, 1 1/2-ton, 4x4 (Chevrolet), and Truck, 2 1/2-ton 6x6 (GMC) = Oversize Tie Rod Yoke Bolt, 2 pages.
PB 86628 - BSIR 9(4):317; 04/23/48
Truck, 2½-ton, 6x6, (GMC Model CCKW-353 LWB) Installation of Loading Aid Kit 7069664, for M55 Gun Mount), 9 pages.
PB 36720 - BSIR 3(4):268; 10/25/25
Technical Bulletin, TB 9-1802A-1, 45.
Fits, Tolerances, and Wear Limits for GMC Model "270" Engine, 17 pages.
PB 86550 - BSIR 9(2):180; 04/09/48
Reclamation of Chevrolet and GMC Hub Adjusting Nut and Oil Seal Assemblies, 3 pages.
PB 48330 - BSIR 4(4):330; 01/24/47