Chassis Systems

Documents related to GMC Chassis
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This is the final firmware update RobR put out for the EBL Flash ECM (Note: Requires WUD 3.1)
Dave Lenzi's Large Mid-Axle Disk Brake System overview
The definitive guide to tire and wheel options for the GMC Motorhome
Fan Shroud Modification, lose 25 lbs and gain access to belts etc. From Billy Massey's HTML document
knuckle comparisons between OEM and one-ton including measurements by Jim Roundtree
DO NOT replace the main fusible link with a fuse or circuit breaker as recommended by some.
TH425 Parts Book 2024-12-24
GM booklet of TH425 parts
A GM service manual on troubleshooting issues in the TH425 and TH400 transmissions
Bill Hubler was one of the first to engineer and install the one-ton front end on a GMC motorhome
Zay Brand's excellent document on dash HVAC operation and improvements
Calipers use a built-in motor for parking brake. Kit developed by Albert Branscombe
GMCWS technical seminar 10/10/2006 by Chuck Botts, Jim Kanomata & Grandpaw Billy
A better fix than the APC for the alternator exciter wiring overheating issue
How I use a laser level to check and align toe and camber on all 6 wheels.