1989 GMC Sierra TSBs
4 Technical Service Bulletins across 4 categories
Fuel System
1 bulletinThis service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent...
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additive.
Electrical
1 bulletinThis Preliminary information communicates a customer concern ofIPC gauges inoperative or fluctuate, No Start,No...
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Crank,SIR Light / Service Airbag Message, Service Suspension Message,Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback,HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0020, U0029, U007D, U0073, U0078, U0100, U0101, U0102, U0104, U0140, U0151, U0155, U0164,U0184, U0186, U0198, U0422. Dealer is instructed to check Serial Data Gateway Module X2 connector for terminal concerns and repair as needed.
Transmission
1 bulletinDIAGNOSTIC INFORMATION FOR INTERMITTENT TRANSMISSION DOWNSHIFT, SLIP, BUSY/CYCLING TCC OR NOISY COOLING FAN.
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*TT
Suspension
1 bulletinSPRING SLAP NOISE FROM THE REAR OF THE GMT 400 SERIES TRUCK.
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*MN