I have a problem with my truck, I need your advice. Can you help me?

Asked by Guru9DJXSD Nov 21, 2020 at 04:55 AM about the 2003 GMC Sierra 1500 Work Truck Extended Cab SB

Question type: Maintenance & Repair

I have a 2003 gmc Sierra 4.8L Ext. Cab 4x4
high mileage. It runs great when you
started up and drive it. Once you turn it off
for a while. It starts up fine, but when you
try and drive it, it skips an it has very little
power. When diagnose it say the fuel
injectors are  only working on one side. My
mechanic said the fuel pressure is fine.
He's changed out the computer, tune up,
catalytic converter, check the fuel
injectors, check the wiring harness to the
engine and working on checking the wiring
harness from the fuel tank to the
computer / engine not sure which one. I
am not a mechanic. My trucks been out of
service for three months now. Can
someone make a recommendation?

1 Answer
1,800

Carpentar answered 3 years ago

I went through this w my 04 Yukon XL w 5.3 fuel pump was putting out 40 psi cold, once warm the pressure would hit 35-33 psi which is right at the starving stalling threshold, replaced pump helped, still had idle misfire (intermittent) and pass side rail of injectors not working replaced tps and throttle plate assembly problem solved. I did the chase the grounds game and all the bs and I'm the end was two bad parts. Hope this helps. Ps buy delco/Delphi parts better quality and engineered for you Chevy.

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,340
  • #2
    dragonflyoffshore
    Reputation
    11,500
  • #3
    John Saffrahn
    Reputation
    11,440
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
204 Great Deals out of 8,074 listings starting at $3,000
Used Ford F-150
325 Great Deals out of 13,693 listings starting at $3,800
Used GMC Sierra 2500HD
37 Great Deals out of 2,183 listings starting at $3,000
Used Toyota Tundra
47 Great Deals out of 984 listings starting at $9,992
Used Chevrolet Silverado 2500HD
25 Great Deals out of 1,696 listings starting at $3,000
Used Toyota Tacoma
43 Great Deals out of 730 listings starting at $9,975
Used GMC Yukon
13 Great Deals out of 972 listings starting at $3,000
Used Dodge RAM 1500
3 Great Deals out of 90 listings starting at $2,500
Used Chevrolet Tahoe
11 Great Deals out of 839 listings starting at $9,980
Used Ford F-250 Super Duty
26 Great Deals out of 797 listings starting at $3,590
Used GMC Canyon
21 Great Deals out of 885 listings starting at $5,477

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.