truck wont warm up

Asked by Feb 13, 2016 at 10:58 PM about the 1994 GMC Sierra 1500

Question type: Maintenance & Repair

My 1994 v6 gmc 1500 4x4 will not warm up the
gauge barley gets over 100 an it blows cold air i
replaced both coolant sensors an put a new
thermostat in an i even took the fan off to see if it
would get warm an it wont i have tried everything..
thanks for the help in advance

14 Answers

5,855

verify the temperature before and after the thermostat - it is possible the gauge is faulty

I just drove it like 4 miles i wanna say an i can get out an grab ahold of all the hoses on the motor

An the truck didnt barely move from 100 when i change the thermostat

5,855

if the coolant is full and the temperature is still low then its possible the new tstat is bad - that is the only temp controlling component I the system.

But with no fan it would still get hot shouldn't it

5,855

if you have acces to an inferred thermometer check tsat housing temp and make sure the housing gets to operating temperature

5,855

without a fan or with a fan if the tstat is stuck open it will not heat up properly

5,855

if you find my help useful please hit the "mark helpful" button - thank you

I could touch the manifolds even though

5,855

which manifolds?

The exhaust an i tested the tstat an i touched the intake

5,855

Do yo have access to a inferred thermometer (electric laser thermometer) you need to physically check the operating temperature of the vehicle - make sure it is warmed up properly - I'm not sure where you live, I live in Arizona so it only takes about 5-8 minutes to warm up a vehicle to operating temperature

Best Answer Mark helpful
73,675

I agree with MStamps, gotta be a defective tstat. Take it out and put it in a pan of water on the stove with a thermometer, see when it opens. It may be open now when you pull it.

1 of 1 people found this helpful.

Already did thst

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 65,399 nationwide Sierra 1500 listings starting at $1,995.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,340
  • #2
    John Saffrahn
    Reputation
    3,690
  • #3
    Glenn Clingenpeel
    Reputation
    3,380
View All

Related Models For Sale

Used Ford F-150
2,264 Great Deals out of 181,810 listings starting at $1,000
Used Dodge Ram 1500
379 Great Deals out of 10,851 listings starting at $1,500
Used Toyota Tacoma
587 Great Deals out of 42,313 listings starting at $1,995
Used GMC Yukon
399 Great Deals out of 21,242 listings starting at $1,495
Used Chevrolet Tahoe
661 Great Deals out of 39,350 listings starting at $1,000
Used Chevrolet Camaro
398 Great Deals out of 30,570 listings starting at $3,550

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
80 Great Deals out of 30,753 listings starting at $18,148
2016 GMC Sierra 1500 For Sale
104 Great Deals out of 3,729 listings starting at $15,988
2015 GMC Sierra 1500 For Sale
139 Great Deals out of 4,803 listings starting at $17,898
2014 GMC Sierra 1500 For Sale
147 Great Deals out of 4,846 listings starting at $14,205
2013 GMC Sierra 1500 For Sale
72 Great Deals out of 2,027 listings starting at $8,450

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.