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Chevy Blazer GMC Jimmy Maintenance and Repair

3451 messages,  Last post on Dec 05, 2009 at 8:12 PM

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#3253 of 3451 Re: Chevy blazer headlight replacement [kennethg] by duntov Aug 17, 2008 (9:15 am)
Replying to: kennethg (Aug 16, 2008 5:47 pm) I can change a 1991 Blazer headlight blindfolded. They can b e replaced from the front just like all GM headlights have been replaced as far back at 1948. All you need is a wire coathanger with a little hook on the end, a long, thin, flat-blade screwdriver and a little stool to sit on. Reach in with the hooked-end coathanger to pull out the headlight spring and unhook it from the headlight retaining ring, unscrew the two headlight ring attachment screws from the headlight ring , pull out the headlight and unplug it from the wiring harness. . Then reassemble it in reverse. Don't remove or unscrew the headlight aiming screws.   You probably have the "new and improved" headlight assemblies.. I have never replaced the whole headlight assembly on one of those but the little bulb is the twist in type that twists into the socket hole in the headlight assembly. I assume you are having a problem finding the headlight socket hiole. The headlight bulbs on the other later model cars I have replaced does not require removing the whole headlight assembly. Don't touch the new bulb with your fingers or it will prematurely fail. Those little twist in headlight bulbs burn hotter and the oil from your fingers will cause the glass to fracture.
#3254 of 3451 Re: Chevy blazer headlight replacement [kennethg] by jlflemmons Aug 17, 2008 (3:32 pm)
Replying to: kennethg (Aug 16, 2008 5:47 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 3451 Spark plugs, 1996 GMC Jimmy by friend2 Aug 19, 2008 (4:47 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 7:56 pm) johnss10 (Aug 20, 2008 3:25 pm) friend2 (Aug 20, 2008 3:35 pm) duntov (Aug 20, 2008 3:58 pm)
#3256 of 3451 Re: Spark plugs, 1996 GMC Jimmy [friend2] by jlflemmons Aug 19, 2008 (7:56 pm)
Replying to: friend2 (Aug 19, 2008 4:47 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 3:25 pm) friend2 (Aug 20, 2008 3:35 pm) duntov (Aug 20, 2008 3:58 pm)
#3257 of 3451 Re: Spark plugs, 1996 GMC Jimmy [jlflemmons] by johnss10 Aug 20, 2008 (3:25 pm)
Replying to: jlflemmons (Aug 19, 2008 7:56 pm) Also, get a good brand cap and rotor, like Delco. The house brand ones don't last very long.
#3258 of 3451 Re: Spark plugs, 1996 GMC Jimmy [jlflemmons] by friend2 Aug 20, 2008 (3:35 pm)
Replying to: jlflemmons (Aug 19, 2008 7:56 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 3:58 pm)
#3259 of 3451 Re: Spark plugs, 1996 GMC Jimmy [friend2] by duntov Aug 20, 2008 (3:58 pm)
Replying to: friend2 (Aug 20, 2008 3:35 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 3451 1995 GMC Jimmy temperature gauge reading faulty by beneyce Aug 24, 2008 (10:59 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 2:31 pm)
#3261 of 3451 Re: 1995 GMC Jimmy temperature gauge reading faulty [beneyce] by jlflemmons Aug 24, 2008 (2:31 pm)
Replying to: beneyce (Aug 24, 2008 10:59 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).

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