Fuel Pump - '98 GMC Safari

1998 GMC SAFARI
118,000 MILES • 6 CYL • AWD • AUTOMATIC
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PJGREEN1
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  • 4 POSTS
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??
Aug 9, 2011 at 8:13 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
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.
Aug 9, 2011 at 8:50 PM
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