Mechanics

FUEL PUMP - '98

1998 GMC Safari • 6 cylinder 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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Pjgreen1@comcast.net
August 9, 2011.



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.

Hmac300
Aug 9, 2011.