1997 gmc jimmy 4.3L

1> what kind of plug can change the old one with ?
2> what is the gap for the plugs?
3> whats the best way to get to the plug thats on the Driver side Under the steering arm?

4> whats the firing order 246,135?
5> where is that o2 senses located, and what would happen to my truck if i had a bad one.

i have many more questions but that's it for now

 

1. Ac Delco #12
2. .060
3. though the fender well
4.165432
5. there are 3, One on each pipe coming off of the manifolds and on after the cat. fuel economy goes down and the check engine light comes on.


hope this helps.

 

1. Or AC/Delco Double Platinum #41-993 factory pre-gapped at .060.
3. This has been discussed many, many times. Please use the 'search' function for '#3 spark plug', etc.

 

wow how do you tell what one is bad then ? or do replace them all there like 60 bucks a pop

 

is the check engine light on? it will throw a code if the o2 sensor is bad. may have a clogged cat.

 

Just to clarify, a '97 will likely have four (4) O2 sensors.

If you do need to replace an O2 sensor, use AC Delco sensors only. In my experience, AC Delco sensors last longer than others. But do diagnose the problem first. It is never a good idea to just throw parts at a problem.