Check Engine Light and Misfire Due to One or More Stuck Closed Fuel Injectors on GMC 1500 Pickup

One or more fuel injectors may become stuck closed causing an engine misfire  and the Check Engine Light to illuminate. Our technicians tell us that this problem can be caused by some fuel additives. There are special procedures which may be able to restore the affected injector. If this fails the affected injector must be replaced.

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Average mileage: 175,630 (130,000–280,151)
Engines affected: 4.3L V6, 5.0L V8, 5.7L V8
4 model years affected: 1996, 1997, 1998, 1999
9 people reported this problem
3 people shared problem details
1998 GMC 1500 Pickup- 5.7L V8280,151
p0304 code,wont hold fuel pressure when fuel pump is off.it also has bad cat codes
1996 GMC 1500 Pickup- 4.3L V6140,000
when driving there is a studder when accelerating,also the o2 sensors are needed,and my check engine light is on
I have seen this happen on about a dozen occasions, it is a definite problem with this design of fuel injection, but they do sell an upgrade design as a replacement, which is very nice.
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