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Fuel Pump - '98 GMC Safari

Tiny
PJGREEN1
  • MEMBER
  • 1998 GMC SAFARI
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 118,000 MILES
GMC Safari '98. Fuel pump starts making high pitched sound. OBD = PO452. Then goes away. Also, fuel gauge needle vibrates at a high rate that just makes needle look fat. Gauge goes extreme right and off scale when key first turned on. Fuel pump is only 8 months old and still warrantied, but is very hard to remove as you know. Any thoughts?
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Tuesday, August 9th, 2011 AT 8:13 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Code 452 is low voltage to fuel pressure sensor which is in the tank. I d check for a grounded wire along the harness. Maybe it's become pinched since the install of the new pump.
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Tuesday, August 9th, 2011 AT 8:50 PM

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