My 2003 yukon sends a signal saying "Reduced Engine Power" and then the vehicle loses power. What casuses this, how can it be fixed?

Asked by Apr 26, 2015 at 09:12 AM about the 2003 GMC Yukon SLT

Question type: Maintenance & Repair

2 Answers

when mine does this I have found that if you unplug the wiring harness on the side of the throttle body and count to 10 and plug it back in it temporarily solves the problem for about 3 months. If this helps you the engine light will stay lit for approximately 3 starting cycles the returns to normal operation. I suspect a bad computer control on the left side of the firewall where the other end of the wiring harness connects.

I have same issue with my 2003 Yukon xl w/ 5.3. Check the owners manual, and said and issue w/ the coolant. So who is right??????

Your Answer

GMC Yukon Experts

  • #1
    clayduster71
    Reputation
    2,780
  • #2
    David Boccabello
    Reputation
    910
  • #3
    Drpsychmom
    Reputation
    750
View All

Related Models For Sale

Used Chevrolet Tahoe
822 Great Deals out of 40,008 listings starting at $1,700
Used Cadillac Escalade
275 Great Deals out of 12,137 listings starting at $2,995
Used GMC Yukon XL
292 Great Deals out of 13,337 listings starting at $1,750
Used Chevrolet Suburban
494 Great Deals out of 23,373 listings starting at $1,995
Used GMC Sierra 1500
1,120 Great Deals out of 61,760 listings starting at $1,295
Used Ford Expedition
484 Great Deals out of 20,188 listings starting at $2,388
Used Chevrolet Silverado 1500
2,684 Great Deals out of 157,095 listings starting at $1,000
Used Cadillac Escalade ESV
135 Great Deals out of 6,341 listings starting at $1,995
Used Ford F-150
3,046 Great Deals out of 230,458 listings starting at $1,300
Used Jeep Grand Cherokee
901 Great Deals out of 71,272 listings starting at $900
Used Ford Explorer
1,112 Great Deals out of 68,286 listings starting at $1,200
Used Dodge Durango
267 Great Deals out of 24,887 listings starting at $1,500
Used Toyota 4Runner
335 Great Deals out of 29,410 listings starting at $1,500
Used Nissan Armada
134 Great Deals out of 10,319 listings starting at $1,990

Used Cars For Sale

2018 GMC Yukon SLT For Sale
875 listings starting at $49,925
2017 GMC Yukon SLT For Sale
13 Great Deals out of 458 listings starting at $36,000
2016 GMC Yukon SLT For Sale
15 Great Deals out of 199 listings starting at $34,999
2015 GMC Yukon SLT For Sale
17 Great Deals out of 288 listings starting at $28,995
2014 GMC Yukon SLT For Sale
65 listings starting at $19,600

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.