1997 GMC Sonoma Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1997 GMC Sonoma

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1997 GMC Sonoma Problems

Check Engine Light With Code P1870

Vehicles equipped whit a 4 speed automatic transmission may develop a harsh 1-2 shift and/or illumination of the Check Engine Light with code P1870 stored. This can be caused by wear of the bore for the TCC isolator and regulator valves in the valve body. This condition does not commonly occur until the transmission reaches normal operating temperature. If the valve body is worn, replacement will be necessary to correct this concern.

Check Engine Light Due to Gas Cap Issue

A Loose or worn gas cap may cause Check Engine Light to illuminate.

Serpentine Belt Tensioner May Fail

The serpentine belt tensioner can fail; it may become noisy and/or the belt may jump off. Replacement of the failed tensioner will be necessary.

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1997 GMC Sonoma Questions

New battery and fuel pump still won't start it's been sitting for about a month (1 answer)

Have checked fuel pressure from Schrader valve next to fire wall have good pressure just don't know what else it could be

Injectors are putting too much fuel into the cylinders (1 answer)

Injecting too much fuel into the cylinders. Injectors are new, pressure regulator is new. Plugs are new.????

replaced fuel pump, just sometimes acts like its running out of gas and sometimes it stales. (1 answer)

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1997 GMC Sonoma Recalls

Recall 97V146001
VEHICLE DESCRIPTION: LIGHT DUTY PASSENGER PICKUP TRUCKS EQUIPPED WITH 4.3L ENGINES. THE FRONT BRAKE LINE CAN CONTACT THE LEFT-HAND SIDE OF THE ENGINE OIL PAN CAUSING THE BRAKE LINE TO WEAR TO THE POINT OF BRAKE FLUID LOSS DURING BRAKE APPLICATION.
Recall 97V096001
VEHICLE DESCRIPTION: EXTENDED CAB PICKUP TRUCKS EQUIPPED WITH 60/40 FRONT BENCH SEATS AND EXTENDED CAB PICKUP TRUCKS AND 2-DOOR UTILITY VEHICLES EQUIPPED WITH MANUAL LOCKING RECLINER BUCKET SEATS. THE OUTBOARD SAFETY BELT WEBBING ON THE DRIVER'S AND/OR PASSENGER'S SEAT CAN SEPARATE DURING A FRO...

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1997 GMC Sonoma Reviews

Bought 1997 Sonoma with 4.3 V6 and 5 speed Trans with 36000 miles on her. Since then I have 0ver 373000 miles on her as of today. She's one tough truck. Since New I have replaced 1 water pump, 1 fuel pump, 1 intake gasket. Believe it or not. I,m still on the original clutch, though She starting to chirp once in a while now. So my baby letting me know its getting to be time for replacement. I'm ...
I have a 97 gmc sonoma and it stalls out at times while driving. the mechanic can't find the reason for it happening. He thought it was the module so he changed it but it stalled out again. I suggested that it might be the fuel filter but he said that was not possible. Any suggestions?
one of the reasons why a fuel pump goes bad is lack of changeing the filter and the pump has to work harder to push the fuel through the system

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