Truck fuel problem

Asked by Jun 16, 2017 at 11:53 PM about the 1999 GMC Sierra Classic 1500

Question type: Maintenance & Repair

Could it be fuel pressure regulator

3 Answers

115,055

I suppose it could be but what is the problem? Did you replace the fuel filter?

85,345

What you do is check the fuel pressure at the Schrader Valve with a fuel pressure gauge. The fuel pressure should be 56 to 63 lbs. Turn the key to the on position to build up fuel pressure. Then let it sit for just over 3 minutes. Fuel pressure should not drop more than 5 lbs. in 3 minutes. If it does, then it is a indication of the spider injection assembly leaking and would need replacing. Otherwise a bad fuel pump. Change out the fuel filter first tho.

85,345

So I see further down you had cut the catalytic converters off. Are the O2 sensors still installed? Not having the cats on creates a problem with the air fuel mixture, you probably have a check engine light on. This vehicle needs the catalytic converters on to run properly.

Your Answer:

Sierra Classic 1500

Looking for a Used Sierra Classic 1500 in your area?

CarGurus has 265 nationwide Sierra Classic 1500 listings starting at $2,995.

ZIP:

GMC Sierra Classic 1500 Experts

  • #1
    JRKMotorZ
    Reputation
    60
  • #2
    David Tinnin
    Reputation
    20
  • #3
    John Saffrahn
    Reputation
    10
View All

Related Models For Sale

Used GMC Sierra 1500
777 Great Deals out of 60,201 listings starting at $1,500
Used Chevrolet Silverado 1500
1,726 Great Deals out of 154,936 listings starting at $1,700
Used Ford F-150
2,281 Great Deals out of 188,281 listings starting at $1,300
Used Dodge Ram 1500
335 Great Deals out of 9,325 listings starting at $1,500
Used Chevrolet Silverado 2500HD
337 Great Deals out of 29,195 listings starting at $2,795
Used Toyota Tacoma
421 Great Deals out of 49,181 listings starting at $2,400
Used Toyota Tundra
461 Great Deals out of 37,862 listings starting at $1,750
Used GMC Yukon
326 Great Deals out of 21,887 listings starting at $2,950
Used Ford F-250 Super Duty
476 Great Deals out of 37,892 listings starting at $1,999

Used Cars For Sale

2007 GMC Sierra Classic 1500 For Sale
17 Great Deals out of 262 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.