Check the vacuum module under the battery try first. (Two of the I believe 4 bolts come in from the wheel well on the passenger side.) It looks like an old cruise control unit. The rubber gets old dried out and brittle. It can't hold vacuum then. Easy to change NAPA sells them for about $50-$60. If it's not dry rotted and holds vacuum let us know and we can go from there.
4 wheel drive will not clic in
2003 GMC Sonoma SLS Ext Cab 4WD
-
Maintenance & Repair
only after the car is warm will the car feel like it lost power completely and come right back. This only happens as I push on the gas. It never has shut off on me. Always starts. its just like some...
1999 GMC Sonoma
-
Maintenance & Repair
99gmc services light flashes at highway speed.
1999 GMC Sonoma 2 Dr SL 4WD Standard Cab SB
-
Maintenance & Repair
Driving in the snow the other day and I went to put it in 4x4 but it did not engage. Indicator lights were not lit on any selection as well (2hi, 4hi, 4lo). Pulled fuse to check for problems and didn'...
1994 GMC Sonoma 2 Dr SLS 4WD Extended Cab SB
-
Maintenance & Repair
what could be causing my park lite on the front passenger side brighten when I push my brakes?
2002 GMC Sonoma SLS Crew Cab 4WD
-
Maintenance & Repair
Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.