H2 cuts off when I shift into gear


Asked by Oct 09, 2013 at 09:37 PM about the 2004 Hummer H2 Base

Question type: Maintenance & Repair

10 Answers


Could it be a o2 sensor?

1 of 1 people found this helpful.


there is a "diagnostic" plug not three feet from the ignition switch...this will tell you any troubles for failed items...however would NOT identify a bad fuel regulator...as this one could have a torn diaprhagm or vacuum hose fallen off...would create this condition and not be detected by the OBD-II~ check your fuel pump regulator~


I read it I could need to replace my ignition switch, which has been a little sticky lately. Its a 30 dollar part.. is this bad advice

1 of 1 people found this helpful.

I meant "pressure regulator" not Pump regulator here is what it looks like~

your car needs to start...will shop~....yeah, some money...but ya gotta if is like you say it is~

1 of 1 people found this helpful.

My truck will crank, stay started for ever.. but when I put it in gear it cuts off.

1 of 1 people found this helpful.

Could be the throttle control not kicking up when you put it in gear. This truck has a drive-by-wire (No mechanical cable) throttle. See the following link. Also shows how to clean one, but it might be too late for that? http://easyautodiagnostics.com/gm_electronic_throttle_cleaning/throttle_body_cleaning_1.php

1 of 1 people found this helpful.

Gonna try it out in the morning. ..to be continued


I tried a injection cleaner let the truck run 4 about 30 minutes. About 12 hours later gave it a boost then drove 20 miles without a cut off. So far so good. Tomorrow new battery then I will see if it actually worked.

1 of 1 people found this helpful.

Your Answer


Looking for a Used H2 in your area?

CarGurus has 1,266 nationwide H2 listings starting at $6,990.


Hummer H2 Experts

  • #1
    Tom Demyan
  • #2
    Michael Kane
  • #3
    Siva Koenigsegg
View All

Related Models For Sale

Used Hummer H2 SUT
6 Great Deals out of 249 listings starting at $13,990
Used Hummer H1
67 listings starting at $49,995
Used Cadillac Escalade
212 Great Deals out of 11,073 listings starting at $2,888
Used Chevrolet Tahoe
642 Great Deals out of 36,956 listings starting at $1,800
Used Ford F-150
2,230 Great Deals out of 183,025 listings starting at $1,500
Used Jeep Wrangler
281 Great Deals out of 15,911 listings starting at $2,997
Used Chevrolet Corvette
246 Great Deals out of 22,203 listings starting at $2,500
Used GMC Yukon
418 Great Deals out of 21,028 listings starting at $1,495
Used Land Rover Range Rover
117 Great Deals out of 5,002 listings starting at $3,482
Used Ford Mustang
771 Great Deals out of 42,663 listings starting at $1,300

Used Cars For Sale

2008 Hummer H2 Base For Sale
19 listings starting at $21,648
2007 Hummer H2 Base For Sale
4 Great Deals out of 116 listings starting at $12,875
2006 Hummer H2 Base For Sale
11 Great Deals out of 184 listings starting at $11,995

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.