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Chevy Blazer GMC Jimmy Maintenance and Repair

3263 messages,  Last post on Sep 04, 2008 at 3:14 PM

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#3254 of 3263 Re: Chevy blazer headlight replacement [kennethg] by jlflemmons Aug 17, 2008 (4:32 pm)
Replying to: kennethg (Aug 16, 2008 6:47 pm) What year model? The newer (96 and newer) just use two tabs that are pulled up and release the headlight assembly. Bulb change takes less than 5 minutes.
#3255 of 3263 Spark plugs, 1996 GMC Jimmy by friend2 Aug 19, 2008 (5:47 pm)
I recently bought a '96 Jimmy for my son. We have been looking at fuel economy and I thought we should look at the spark plugs to see what kind of shape they are in. This is a 4 x 4 with 87600 miles on it.   I am embarrassed to say I could not trace down the spark plugs. I need someone to tell me where they are located at on the engine. Also the best way of pulling each of them.   It is the 4.3L, V6.   Thank you Replies to this message: jlflemmons (Aug 19, 2008 8:56 pm) johnss10 (Aug 20, 2008 4:25 pm) friend2 (Aug 20, 2008 4:35 pm) duntov (Aug 20, 2008 4:58 pm)
#3256 of 3263 Re: Spark plugs, 1996 GMC Jimmy [friend2] by jlflemmons Aug 19, 2008 (8:56 pm)
Replying to: friend2 (Aug 19, 2008 5:47 pm) It's a Chevy engine, and the plugs are under the exhaust manifolds instead of above. Most are easy to get to, except the #3. That's the middle plug on the drivers side. Easiest way to get that one out is to disconnect the steering shaft from the steering gearbox and move the shaft out of the way an inch or so.   Be sure and put platinum tip plugs back in. They will last a good 75K miles or more. Also be sure to change the rotor and cap. The rotors will cook off twice as fast as the plugs. Easy to change, and should be done every 50K at least. Replies to this message: johnss10 (Aug 20, 2008 4:25 pm) friend2 (Aug 20, 2008 4:35 pm) duntov (Aug 20, 2008 4:58 pm)
#3257 of 3263 Re: Spark plugs, 1996 GMC Jimmy [jlflemmons] by johnss10 Aug 20, 2008 (4:25 pm)
Replying to: jlflemmons (Aug 19, 2008 8:56 pm) Also, get a good brand cap and rotor, like Delco. The house brand ones don't last very long.
#3258 of 3263 Re: Spark plugs, 1996 GMC Jimmy [jlflemmons] by friend2 Aug 20, 2008 (4:35 pm)
Replying to: jlflemmons (Aug 19, 2008 8:56 pm) Thanks for your input.   I am looking on how to improve the gas mileage and performance. Are there other things we can do ourselves to the engine?   Any additives that actually work out there as well? Replies to this message: duntov (Aug 20, 2008 4:58 pm)
#3259 of 3263 Re: Spark plugs, 1996 GMC Jimmy [friend2] by duntov Aug 20, 2008 (4:58 pm)
Replying to: friend2 (Aug 20, 2008 4:35 pm) The 3.4L Chevrolet V6 is very limited to performance up-grades. It was about optimum in performance when it left the factory. The exhaust system is very good and the ignition system is excellent. The S10/S15 Blazer/Jimmy fuel injection system can support up to 300 HP without any modification.   Use a premimum NAPA distributor cap with brass electrodes. The AC Delco distributor cap is equipped with aluminum electrodes which will oxidize and fill the cap with alumium oxide dust which will cause spark scatter, especially with the factory high voltage electronic ignition systems.
#3260 of 3263 1995 GMC Jimmy temperature gauge reading faulty by beneyce Aug 24, 2008 (11:59 am)
Hi, I have a 1995 GMC Jimmy. I have replaced the water pump and thermostat due to a percieved overheating problem. I have a snapon mt2500 that I hooked up to the computer. The temperature is running from 185 degrees to about 195 on the scan took. No over heating. It is cooling just as it should. The gauge reads about 250 degrees. Is this a common problem? How can I fix this problem. temp sending unit? or different gauge cluster? Any ideas? Thanks -Ben Replies to this message: jlflemmons (Aug 24, 2008 3:31 pm)
#3261 of 3263 Re: 1995 GMC Jimmy temperature gauge reading faulty [beneyce] by jlflemmons Aug 24, 2008 (3:31 pm)
Replying to: beneyce (Aug 24, 2008 11:59 am) The sending unit is more likely the culprit. If you have access to an ohm meter, you can check the resistance of the sending unit. It should read around 2.5K to 5K cold, and below 200-300 ohms hot (170 to 200 degrees).
#3262 of 3263 Fuel Pump?? by deniced Aug 31, 2008 (11:40 am)
Last week while driving my 97 Blazer i noticed the volt gauge dip down to about 12 and the running lights went out. It immediately went back up to 14 but the lights never came back on. When i restart it the lights come back on again. I had the alternator replaced even tho it tested fine. The battery also tested fine. It continued to happen about 3 times on my 20 mile drive to work every day for the last week. This morning i started it and was backing down the driveway and it died. It restarted and i got it back up the drive. It died again. Now when i try to start it i dont hear the fuel pump. Are these problems related? Replies to this message: johnss10 (Sep 04, 2008 3:14 pm)
#3263 of 3263 Re: Fuel Pump?? [deniced] by johnss10 Sep 04, 2008 (3:14 pm)
Replying to: deniced (Aug 31, 2008 11:40 am) This really sounds like a loose connection. Alternator is 14 volts, battery is 12 volts, so the alternator is going offline when the voltage drops to 12. Could be alternator or battery, or ground. I had a similar situation and it turned out that the hole in the battery for the positive cable bolt was too shallow, so the bolt bottomed out and was not really tight. A washer under the bolt fixed it.

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