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1999 Other GMC Models Hard Start When Warm

Tiny
AMAN721
  • MEMBER
  • 1999 GMC
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
Starts right away when cold. Cranks for several seconds when warm. Back fires every couple of weeks.
Sunday, February 3rd, 2008 AT 2:52 AM

2 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
The fuel pressure regulator may be your problem if it is leaking. Sometimes there will be a raw fuel scent at the motor when this happens. The 5.3 motors were affected by this.
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Sunday, February 3rd, 2008 AT 6:43 AM
Tiny
CHI211TOWN
  • MEMBER
  • 1 POST
No gas scent with the 5.7 last year produced with that engine motor was warm after 20mins it finally started
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Thursday, November 3rd, 2022 AT 1:52 PM

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