I have a 1994 GMC K1500 5.7L, the previous owners switched from the standard exhaust system to headers. How do you properly change from a standard exhaust system to a header system??

Asked by king242010 Sep 11, 2014 at 09:05 PM about the 1994 GMC Sierra C/K 1500

Question type: Maintenance & Repair

We are having issues with power loss and cannot find what is causing it. We are finding
many different things that were disconnected and removed that probably should have
stayed on.

5 Answers
63,145

BoholMark answered 10 years ago

Good luck. It's not easy to give you a good answer here. Check the vacuum lines that are not disconnected. Start there.

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61,205

Andrew answered 10 years ago

Well. You need of sensors. If they aren't there then that's one problem

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king242010 answered 10 years ago

We have checked a lot of sensors on the truck MAP, EGR, Throttle position..etc. Is there a way to find a complete list of sensors that should be on the truck?? We changed out the plugs, wires, button, and cap today and checked the fuel pressure, everything looked good

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