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Re a 88 K2500 4x4 auto trans with a 5.7L TBI, I'm looking for a procedure to replace the right front axle shaft seal. Haynes talks about removing the axle tube with all components and taking it to a dealer for seal and/or bearing replacement. Is it possible to undo the drive axle and push it out...

1988 GMC K2500 5.7L There is a pressure switch near the firewall that has a cap with two wires. Once removed it exposes the connector and also a set screw between the connectors. Can anyone help with an adjustment procedure that can be done without a pressure gauge. I'm trying to reduce the time...

The tech at the GMC shop check the fuel pressure. The only change made to date is the fuel filter and that seems to have corrected the original problem. I'm exploring the injector issue as it may imporove the trucks camper hauling ability. I will be pulline out the fuel pum in the next week or...

Thanks for the bump on this earlier post. As mentioned I am running 5.0L injectors on a 5.7L. While that may cause some driveability issues the actual diagnosis, as determined by a GMC dealer tech, is a faulty fuel pump. I replaced the fuel pump two years ago after a failure. According to the...

Now that I know that this truck is running 5.0L injectors on a 5.7L should I replace them considering the cost - about $300 with gasket set. The truck is used for property maintenance and wood hauling in addition to hauling a camper. Would the increase in performance justify the cost? Your comments?

Thanks Zembonez. Just what I was looking for. I assume that the throttle bodies are basically the same?

My 1988 GMC K2500 originally came with a 5.0L which was changed to a 5.7L by the previous owner. I understand that there is a difference in fuel injectors between these engines. Can anyone help with identifying the injectors that are in the throttle body now and with what I should be looking for...

RE a 1988 GMC K2500 5.7L. I'm trying to diagnose a fuel mixture issue that only occurs after driving for a while - full warm up - and then stopping for some time and partially cooling. Under those conditions it starts great but hesitates on acceleration often setting a lean exhaust code. Once...

Thanks for the advice....... and quick response. A new EGR it is. David

Hello all. First post here. Looks like a great forum. Re: a 1988 GMC K2500 5.7L. Old but only 150,000 Kilometers. A recent stuck EGR valve was corrected by removing the valve and capping the ports. The engine has never run better with a noticeable increase in torque when hauling a camper up a...