gas tank forms suction while driving. truck

2003 GMC C1500
165,000 MILES • 0.5L • V8 • AUTOMATIC
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CHANCE808
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  • 2 POSTS
Truck will run but very very sluggish stalls when hard acceleration. Have changed gas cap and fuel filter. To no avail
Dec 23, 2014 at 9:19 AM
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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san for codes and check fuel pressure with a gauge auto parts rent it.
Dec 23, 2014 at 9:59 AM
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CHANCE808
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I had it.scanned 3 codes 2 02 sensor and knock sensor. But didnt check fuel pressure. What should the pressure be.. and replacing fuel fix it?
Dec 23, 2014 at 10:05 AM
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 48,601 POSTS
you didn't give an engine sizze55.62 psi if it's a5.3L
Dec 23, 2014 at 11:59 AM