what makes temp guage bounce around

35

Asked by Mar 13, 2007 at 08:37 AM about the 1991 GMC Sonoma 2 Dr SLE 4WD Standard Cab SB

Question type: Maintenance & Repair

vehicle has 422,000 miles and temp guage bounces from max temp to middle temp to normal temp and continues on and on. vehicle is running at normal temp while this happens and i checked electrical connections.

6 Answers

31,535

Not sure what else it could be other than an electrical malfunction if you are sure that the vehicle is in fact not over heating and running at normal temperature. 422,000! Wow. You must really have pampered that machine. Thats amazing.

25

change out the thermostat...easy fix.

1 of 1 people found this helpful.
3,165

A broken thermostat wouldn't cause the gauge to bounce around......... The water temp sensor is probably dead or dieing. Find out where it is and replace it.

310

Do this test: Ground out the thermostat lead. If the gauge goes to max, it's the sending unit. If it does nothing, the issue is the gauge or wiring.

1 of 1 people found this helpful.
245

WOW 422 000 YOU SHOULD GET A HOLD OF GM AND SEE IF TH NEED A MUSEUM PEICE TO SHOW OFF THE LONGIVITY OF THE S10 LOL I WOULD DO EXACTLY WHAT BUDDY SAID ABOUT GROUNDING OUT THE UNIT HES RIGHT BUT GM MECHANICAL GUAGES ALWAYS BOUNCE AROUND ESPECIALLY WHEN THY GET OLDER AND HAVE LOTS OF MILES ON IT YOULL PROBALLY END UP CHANGING TE TEMP SENSOR AND GAUGE

35

well I doubt its the timing. Could be possible that you have a clogged radiator, or a sediment built up in the engine block

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Sonoma

Looking for a Used Sonoma in your area?

CarGurus has 469 nationwide Sonoma listings starting at $2,500.

ZIP:

Search GMC Sonoma Questions

GMC Sonoma Experts

#1 parkle
parkle
Reputation 670
#2 Mike Bonnell
Mike Bonnell
Reputation 460
#3 James Mayfield
James Mayfield
Reputation 320
View All

Related Models For Sale

Used Chevrolet S-10
10 Great Deals out of 1,345 listings starting at $1,395
Used Ford Ranger
197 Great Deals out of 5,805 listings starting at $1,650
Used GMC Sierra 1500
822 Great Deals out of 68,199 listings starting at $2,484
Used Ford F-150
2,194 Great Deals out of 206,316 listings starting at $1,499
Used Dodge Dakota
106 Great Deals out of 3,781 listings starting at $1,680
Used Chevrolet Camaro
225 Great Deals out of 30,943 listings starting at $1,217
Used Chevrolet Blazer
4 Great Deals out of 1,167 listings starting at $1,255
Used Jeep Wrangler
276 Great Deals out of 18,163 listings starting at $2,950

Used Cars For Sale

2003 GMC Sonoma For Sale
3 Great Deals out of 102 listings starting at $2,995
2002 GMC Sonoma For Sale
111 listings starting at $2,995
2001 GMC Sonoma For Sale
59 listings starting at $4,500
2000 GMC Sonoma For Sale
66 listings starting at $4,965
1999 GMC Sonoma For Sale
29 listings starting at $2,995

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.