Does a backfire on my 1994 GMC Sierra 1500 means that I need a new fuel pump.? and how do I get the fuel pump out? where would be located?

Asked by Jun 03, 2013 at 10:58 AM about the 1994 GMC Sierra 1500 C1500 SL Extended Cab LB

Question type: Maintenance & Repair

4 Answers

....hold on a minute there, turbo---you've got a fuel filter and fuel pressure regulator, does the motor stop turning evey once in a while? yes it is in the tank, with any luck an access hatch above this pump....messy business.~

Backfire sounds like a premature spark...aka timing---think yours has a distributor, in which case I'd look at the vacuum advance mechanism jumpin' the gun or missing the boat...out of adjustment or the vacuum line is leaking or missing off that one...back off the spark (as long as you've a distributor) to where there isn't a backfire~

your vacuum lines are sucking air, recommend replace the butyl rubber ones with the more expensive silicone that will never decay and leak~

113,195

Is your motor a vortec? If so and it backfired thru the intake inspect intake. Vortec has a plastic intake and will crack or other wise have some sort of damage after a backfire.

2 of 2 people found this helpful.

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 67,901 nationwide Sierra 1500 listings starting at $1,800.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,300
  • #2
    John Saffrahn
    Reputation
    3,660
  • #3
    Glenn Clingenpeel
    Reputation
    3,350
View All

Related Models For Sale

Used Ford F-150
2,216 Great Deals out of 180,841 listings starting at $1,500
Used Dodge Ram 1500
411 Great Deals out of 10,661 listings starting at $1,000
Used Toyota Tacoma
561 Great Deals out of 41,765 listings starting at $2,999
Used GMC Yukon
415 Great Deals out of 20,793 listings starting at $1,495
Used Chevrolet Tahoe
618 Great Deals out of 36,026 listings starting at $1,800
Used Chevrolet Camaro
429 Great Deals out of 31,674 listings starting at $2,395

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
83 Great Deals out of 39,679 listings starting at $23,369
2016 GMC Sierra 1500 For Sale
99 Great Deals out of 3,439 listings starting at $17,977
2015 GMC Sierra 1500 For Sale
119 Great Deals out of 4,432 listings starting at $15,922
2014 GMC Sierra 1500 For Sale
117 Great Deals out of 4,665 listings starting at $12,987
2013 GMC Sierra 1500 For Sale
44 Great Deals out of 1,946 listings starting at $8,999

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.