2003 gmc envoy 4.2L

Asked by Elizabeth Nov 03, 2017 at 11:56 AM about the 2003 GMC Envoy 4 Dr SLE 4WD SUV

Question type: Maintenance & Repair

It won't go over 20 mph on flat land, goes crawling up
hills, has loss of power but idles fine. We have replaced
the fan clutch, serpentine belt, and now put a new throttle
body with throttle position sensor on it along with oil
change. Any other ideas as to what it could be?

7 Answers

45

Have you checked your fuel pressure (fuel pump) and/or fuel air mixture (Mass Air Flow Sensor)? Are you getting any error codes?

3 people found this helpful.
278,435

Fuel pressure and flow would be my first guess also. But if that checks good then Live Data Scanning might be the way too go on this one as you didn't mention seeing a check engine light.

278,435

Forgot about exhaust system back pressure, will the engine rev up if you goose it in park? If not that could also be a problem.

1 people found this helpful.

The check engine light comes on, blinks a few times then stays on before blinking again and just repeats the cycle. I'm not sure if the fuel pressure & flow has been checked. They are supposed to be checking the exhaust system tomorrow.

45

If you go to a car parts store, you should be able to borrow or rent a code reader. If the check engine light comes on, it should store an error code that you can get with the reader. One of the major parts stores loans them for free (Autozone I think but not sure).

Your Answer:

Envoy

Looking for a Used Envoy in your area?

CarGurus has 459 nationwide Envoy listings starting at $2,398.

ZIP:

Sell Your Car Yourself

With a simple, secure transaction.

2003 GMC Envoy 4 Dr SLE 4WD SUV

I have a different car

CarGurus Experts

  • #1
    FJ4072
    Reputation
    1,960
  • #2
    NITROGLORY1
    Reputation
    1,320
  • #3
    Maria Gonzalez
    Reputation
    780
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Trailblazer
21 Great Deals out of 7,805 listings starting at $1,995
Used GMC Yukon
303 Great Deals out of 8,597 listings starting at $2,089
Used GMC Envoy XL
129 listings starting at $1,848
Used Chevrolet Tahoe
531 Great Deals out of 15,415 listings starting at $1,500
Used Ford Explorer
982 Great Deals out of 54,550 listings starting at $2,199
Used GMC Sierra 1500
748 Great Deals out of 33,037 listings starting at $2,800
Used Jeep Grand Cherokee
1,257 Great Deals out of 57,190 listings starting at $1,995
Used GMC Canyon
93 Great Deals out of 2,658 listings starting at $1,550
Used Cadillac Escalade
161 Great Deals out of 4,473 listings starting at $3,475
Used GMC Yukon XL
172 Great Deals out of 5,267 listings starting at $3,976
Used Honda CR-V
968 Great Deals out of 69,182 listings starting at $1,700

Used Cars For Sale

2005 GMC Envoy 4 Dr SLE 4WD SUV For Sale
21 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. Content will be removed if CarGurus becomes aware that it violates our policies.