ATF & Raiator coolant

Asked by GuruGFCF7 Aug 31, 2020 at 04:50 AM about the 2001 GMC Sierra 1500 SLE Extended Cab SB

Question type: Maintenance & Repair

I am an original owner of a  2001 GMC Sierra 1500, V8 (5.3 Vortec) with 131000 miles now. Flushed the Radiator and Transmission 2 times each so far.  Do I need to replace the Radiator or just flush it again? Do I need to replace Transmission Filter as well or just flush the fluid?? Thanks.

2 Answers
41,350

TDolby answered 4 years ago

Right, is there a problem? Are the two fluids mixing? You need to replace the radiator if that is the case. The automatic transmission cooler inside the radiator has failed.

Mark helpful

Your Answer:

Related Questions

  • ATF & Raiator coolant 2 Answers

    I am an original owner of a 2001 GMC Sierra 1500, V8 (5.3 Vortec) with 131000 miles now. Flushed the Radiator and Transmission 2 times each so far. Do I need to replace the Radiator or just flush it...

    2001 GMC Sierra 1500 SLE Extended Cab SB

    -

    Maintenance & Repair

  • Coolant gauge 3 Answers

    I have a 1990 GMC Sierra k1500, I've recently been having fluctuating reading on my coolant dashboard sensors going from normal up to 260 and back down, it constantly does this as I drive. I have...

    1990 GMC Sierra 1500 K1500 4WD Standard Cab LB

    -

    Maintenance & Repair

  • When empty do I fill the coolant resivoir with coolant? 2 Answers

    Had an oil/lube done yesterday and told it was empty (not radiator, just reservoir) - Kwik Kar Lube did not have coolant to put in so will do it myself but need to be sure I am doing the correct thing...

    1999 GMC Sierra 1500 SLE Extended Cab LB

    -

    Maintenance & Repair

  • 2004 GMC Sierra engine coolant hot/ engine overheating 2 Answers

    my truck seems to be leaking coolant causing the dash indicator light to show engine coolant hot engine overheated. when I fill it with coolant I have a leak coming out the bottom how do I tell if ...

    2004 GMC Sierra 1500 4 Dr SLE Crew Cab SB

    -

    Maintenance & Repair

  • coolant leak into engine 1 Answer

    Had an oil leak. Shop replaced my "oil cooler lines to pan Gasket". Within a couple days I've ended up with coolant in the engine. Could the problem be related to the original repair?

    2006 GMC Sierra 1500 Denali Crew Cab 5.8 ft. 4WD

    -

    Maintenance & Repair

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,850
  • #2
    dragonflyoffshore
    Reputation
    11,810
  • #3
    John Saffrahn
    Reputation
    11,720
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
231 Great Deals out of 5,909 listings starting at $2,975
Used Ford F-150
321 Great Deals out of 13,751 listings starting at $1,712
Used GMC Sierra 2500HD
25 Great Deals out of 1,495 listings starting at $8,000
Used Toyota Tundra
36 Great Deals out of 1,350 listings starting at $6,255
Used Chevrolet Silverado 2500HD
27 Great Deals out of 1,242 listings starting at $9,500
Used GMC Yukon
14 Great Deals out of 898 listings starting at $4,555
Used Toyota Tacoma
50 Great Deals out of 1,081 listings starting at $9,998
Used Dodge RAM 1500
4 Great Deals out of 63 listings starting at $3,000
Used Chevrolet Tahoe
14 Great Deals out of 904 listings starting at $12,900
Used Ford F-250 Super Duty
17 Great Deals out of 1,169 listings starting at $8,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.