GMC Sonoma - Popular Questions, Answers, Tips & Manuals

99 to 2007 4.8, 5.3 and 6.0 are all located the same place. They are at the back of the engine about right in the center. Remove the Black Cover on top the engine. With a flashlight and you crawl up on top the engine and look behind the engine towards the top and you should see it. It has an electrical connection on top, you will need a socket that fits and about an 8 inch extentions to get it up and on so you can get your ratchet on. Hope this helps you.

GMC Sonoma Cars... | 39 views | 0 helpful votes

Power comes to the barke switch from fuse STOP LP 20A on an orange wire. Comes out of switch on white wire

2004 GMC Sonoma | 35 views | 1 helpful votes


GMC Sonoma Cars... | 28 views | 0 helpful votes

It could be a leaking fuel injector or a bad fuel pressure regulator. Do this plug the fuel return line then turn the switch on then off, if the pressure holds replace the fuel pressure regulator. If the pressure bleeds down remove the fuel rail with the injectors still attached and see which ones leak. I hope this helps. Take care.

GMC Sonoma Cars... | 39 views | 0 helpful votes

The wipers are not fused, they use a built in breaker.

1991 GMC Sonoma | 38 views | 0 helpful votes

Removing front bumper is easy. Look under the bumper. There are bolts holding it to the frame. Unscrew these and bumper will come of lose. Screw new bumper same way you unscrew the old one. Remember don't titen screws right away. You have to adjust new bamper so visibly floats with fenders and front grill. Than titen up bolts.

GMC Sonoma Cars... | 137 views | 0 helpful votes

they twist and pull out from the back

1996 GMC Sonoma | 33 views | 0 helpful votes

Check bulbs first / fuse / backup switch/neutral safety switch.

1994 GMC Sonoma | 36 views | 0 helpful votes

It's very common for injectors to get clogged. Sometimes a good injection cleaner you put in your fuel tank works and sometimes a professional cleaning works but then again sometimes they don't work at all. Replacement injectors always work, if the fuel pressure was to high all the injectors would flood but check anyway. I hope this helps, Take care

1992 GMC Sonoma | 30 views | 0 helpful votes

If your vehicle seems to be running fine but picks up speed slowly, check to see if you have a check engine light. Having that light can point you in the direction of the problem. Also check to see if you have a bad catalytic converter which can clog your exhaust causing back pressure to the engine and cause your vehicle to pick up speed slowly or feel like it has no power. I hope this helps. Have a great day.

GMC Sonoma Cars... | 27 views | 0 helpful votes

On a small block Chevy, the dipstick is a press in fit. I put silicone where the tube meets the block (bottom of the flare) and let it sit over night. This has worked for me. Good luck!

GMC Sonoma Cars... | 43 views | 0 helpful votes

I could suggest you count them, but if you have the right parts they should fit together just fine. We can thank Eli Whitney and Henry Ford for creating standardized parts.

GMC Sonoma Cars... | 70 views | 0 helpful votes

The code doesn't tell you what to replace just that the computer thinks there is a problem on that system. Did you check sensor wiring circuits? Black wire should be ground--gray wire--ref voltage about 5 volts. The lite green wire signal to computer. The map sensor also needs vacuum.
Use a digital multimeter on signal wire, engine idling. What is the reading? Just for comparison, at idle the tps and map signals should be close to the same reading, won't be exact. If several volt difference that isn't right. In my opinion.

GMC Sonoma Cars... | 672 views | 3 helpful votes

No spark to the spark plugs or no fuel pressure . If the the starter spins the engine over fast enough it's not the battery . Doesn't sound like you know a whole lot about car's . Do yourself a favor an take it to a qualified repair shop . Before you buy alot of unneeded parts .

1994 GMC Sonoma | 77 views | 0 helpful votes

It is located in lower block of engine.

GMC Sonoma Cars... | 57 views | 0 helpful votes

I tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my ford explorer. it wont move forward or
reverse, engine is good both solenoids for forward and reverse work.
I don't have much technical knowledge but I just followed it step-wise, and works perfect! got it from

1999 GMC Sonoma | 617 views | 0 helpful votes

The way to a fix is to view wiring diagrams an use a DVOM - digital volt ohm meter an test the electrical circuit's . If you don't know how to test automotive electrical systems like this , not just replacing part's , your best bet , take it to a qualified repair shop .
Or learn how too do it correctly .
Electric Testing Techniques You Need to Know

Free wiring diagrams here Enter vehicle info. year , make , model an engine size . Under system click on lighting , then under system click on exterior lighting .
Click the search button ,then the blue link's .

when I press the brake pedal my parking lights come on ????? To me this sounds like a ground issue , voltage back feeding through the circuit looking for a ground . view the turn signal wiring an test at the back of the vehicle ,turn signal wiring using voltage drop . Watch this video on voltage drop testing .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

GMC Sonoma Cars... | 41 views | 0 helpful votes

Not finding what you are looking for?

-2,176 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

1999 GMC Sonoma
1999 GMC Sonoma

391 Questions

1996 GMC Sonoma
1996 GMC Sonoma

352 Questions

1995 GMC Sonoma
1995 GMC Sonoma

263 Questions

1998 GMC Sonoma
1998 GMC Sonoma

259 Questions

1997 GMC Sonoma
1997 GMC Sonoma

242 Questions

Top GMC Experts


Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides