1998 GMC Sierra 1500 Low Idle, then dies
5

Asked by LocoSmith Jun 16, 2017 at 09:36 AM about the 1998 GMC Sierra 1500 C1500 SL Extended Cab SB

Question type: Maintenance & Repair

I drove my GMC Sierra (1998) round trip two days ago about 250 miles,
which is more than usual  As I got off the interstate and was stopping at the
stop sign, I noticed it wanted to idle low and was afraid it was going to die.  I
put it in neutral to keep it revved.  I kept it revved each time I had to slow
down significantly until I arrived at home.  Once at home, I stopped the truck
and it died.  I did notice some oil under the truck, which is the first time I've
noticed it.  After checking the oil, it shows more needed to be added.  I
purchased the high mileage Castrol and put some in yesterday but it
continues to idle low.  Please give me suggestions on what I need to do.  
Thanks in advance.

4 Answers
3,505

Brian answered 7 years ago

Which engine is in the vehicle? if it has the 2 injectors on top of the throttle body then one of the injectors could be bad. Or it could just need the throttle body cleaned.

Mark helpful
145,305

T_S_T answered 7 years ago

This could be a clogged fuel filter,dirty throttlle body or bad throttle position sensor.

Mark helpful
5

LocoSmith answered 7 years ago

After looking it over with a mechanic, we noticed that cylinder 7 was misfiring and the rod is bent.

Mark helpful

Your Answer:

Related Questions

  • 1998 GMC Sierra 1500 Low Idle, then dies 4 Answers

    I drove my GMC Sierra (1998) round trip two days ago about 250 miles, which is more than usual As I got off the interstate and was stopping at the stop sign, I noticed it wanted to idle low and was...

    1998 GMC Sierra 1500 C1500 SL Extended Cab SB

    -

    Maintenance & Repair

  • my 94 gmc sierra 1500 will start then dies and then wont start again for awhile 6 Answers

    i will start my truck and it will idle for alittle bit then it dies and wont start again for alittle while. you can smell fuel like it is flooded.. can anyone help plz, pretty much have replaced ever...

    1994 GMC Sierra 1500 K1500 SL 4WD Standard Cab SB

    -

    Maintenance & Repair

  • Ok I have a 1994 GMC 1500 sierra 5.0 305 it dies in gear sound awesome in idle but dies if not on gas 3 Answers

    Ok I have a 1994 GMC 1500 sierra 5.0 305 it dies in gear sound awesome in idle but dies have changed the tps,the EGR Vacuum Solenoid the Idle Air Control Valve , TBI Base Gasket,Fuel Pressure Regulat...

    1993 GMC Sierra 1500 C1500 Extended Cab LB

    -

    Maintenance & Repair

  • 1998 gmc sierra 1500 wont start 1 Answer

    I have a 1998 GMC Sierra 1500 and it will not start. It died on me while I was driving and I had it brought back to my house. I have replaced the fuel filter, the starter and the battery. And I had...

    1998 GMC Sierra 1500 C1500 SLE Extended Cab LB

    -

    Maintenance & Repair

  • 1990 GMC Sierra low idle and stalling 3 Answers

    I have a 1990 k1500 low idle and stalling problem, I replaced my fuel filter and spark plugs, i changed the fuel pump 3 years ago. Weird thing is when I rev the engine the oil display moves with ...

    1990 GMC Sierra 1500 K1500 4WD Standard Cab LB

    -

    Maintenance & Repair

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 5,185 nationwide Sierra 1500 listings starting at $3,475.

Postal Code:

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    13,020
  • #2
    dragonflyoffshore
    Reputation
    11,880
  • #3
    John Saffrahn
    Reputation
    11,810
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
175 Great Deals out of 5,598 listings starting at $4,500
Used Ford F-150
248 Great Deals out of 13,668 listings starting at $1,795
Used Chevrolet Silverado 2500HD
23 Great Deals out of 1,052 listings starting at $9,995
Used GMC Yukon
13 Great Deals out of 614 listings starting at $9,900
Used Toyota Tacoma
56 Great Deals out of 1,097 listings starting at $8,887
Used Dodge RAM 1500
4 Great Deals out of 66 listings starting at $4,997
Used Ford F-250 Super Duty
32 Great Deals out of 1,144 listings starting at $4,999
Used Chevrolet Tahoe
21 Great Deals out of 675 listings starting at $4,998

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.