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I have a 94 GMC Jimmy with a 4.3 Vortec. I was wondering what coolant to use other than Dex Cool. I'm pretty sure Dex Cool didn't come around till 95 or 96 so I should be good on that. The owner manual says to use a coolant that meets GM spec. 6038-m, but I can't find a coolant that meets this. So what should I do?

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Jessie Villarreal

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Useing dex cool is the orange coolant but be aware do not mix the orange with the green coolant it will cause several damages to your coolant system first flush your system before adding the dex cool or use the univeral coolant it can be used on either coolant.

Posted on Mar 06, 2019


terence watts

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Concentrated green .... any brand you choose. Then top off with water.

Posted on Mar 06, 2019


Andrew Taylor

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pat murray

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SOURCE: 1998 GMC Jimmy Vortec V6 4.3L 4WD
hope this helps

Posted on Oct 17, 2008


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SOURCE: How do I replace the starter

the starter will be at the rear of the engine. Disconnect all of the cables, remove the 3 or 4 bolts that hold it in. Pull it straight out of the engine. Install the new starter. Starters are fairly straightforward, but sometimes awkward to reach.

Posted on Dec 04, 2008


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SOURCE: gm dex-cool vs prestone anti-freeze...

yes,your guy is right,a lot of gm cars have the int. gasket problem because of dex.

Posted on Feb 23, 2009



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SOURCE: 95 gmc jimmy firing order

a25aaa8.gifHere u go

Posted on May 15, 2009


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SOURCE: What is a Vortec engine?

The "spider" injector is the problem. You're right that one of the injectors is stuck open, unfortunately it has to be replaced as an assembly. This a common problem on the Vortec V-6's. When you were checking the fuel pressure, the fuel was passing through the open injector, giving you a low reading. After replacing the injector assembly, be sure to change your oil before you start the engine. I'd be willing to be you have a pint or two of gasoline that has gotten into the crankcase. That injector unit will cost you around $350. It's not too hard to put in, just be careful.

Posted on Feb 20, 2010

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1 Answer

Ok I am wondering if my motor in my 91 gmc 5.7 l b8 is a vortec or a 350 it has throttle body carb and not sure thought if I could interchange it with an older 350 ..

Here, is what I think you are asking. The TBI intake from a 91 will fit the same size engine from 88 to 95. The Vortec didn't come out till 96 I believe. So if your 91 is the original engine then it is not a Vortec motor. If you want to swap your 5.7 with another 5.7 (5.7 = 350) Then the 88-95 should work, Just double check your sensors and locations as the plugs may be different and or in different locations. I know my 88 GMC and my 94 chevy (both K1500's) were a little different. Hope this helps.

Jan 17, 2015 | 1991 GMC Sierra

1 Answer

94 4.3 vortec getting horrible gas mileage why???

Go to You Tube Video to find the problems
with that motor & the solution
A local repair shop can check bulletins in their
data base for the fix also
Most likely intake gasket,if you use Dex Cool
It eats gaskets & the vehicle is old ,so you can expect
to be constantly working on it

Jul 01, 2013 | Chevrolet Tahoe Cars & Trucks

1 Answer

I have a 2000 Jimmy. It appears to have black gunk in the engine coolant area (oil?). I am not sure what to do. Advise please.

Is your oil level low? Do you have an oil cooler going to the radiator? If there is then its possble the cooler is leaking inside the radiator.

Does the cooling system still use Dex-Cool? The S trucks are one of the models that seem to have problems with the Dex-Cool. People would usually see a dark brown mud basically in their cooling system.
If it still uses Dex-Cool then I would sugest draining and flushing the cooling system (including a good flushing of the heater core. Remove the hoses and force water through with a garden hose) and refilling with another coolant/antifreeze.

Aug 28, 2011 | 2000 GMC Jimmy

1 Answer

What kind of antifreeze does a GMC Jimmy 1995 use?

There should be a label on the coolant cap that tells you. If not there are two types that fit you make (chevy). Green (ethyl-glycol), or GM's
Dex-cool. In your case I believe the green dyed, ethyl-glycol is for you as GM's change over year is 1997.

Jul 12, 2011 | 1995 GMC Jimmy

1 Answer

Need firing order for 1995 4wd gmc jimmy v6 4.3 vortec

Hi there. I just did a tune up on my 95 Jimmy with the same motor. The firing order is 1-6-5-4-3-2 and the distributor rotation is clockwise. I hope this helps.

Nov 06, 2010 | 1995 GMC Jimmy

1 Answer

My truck only overheats when the a/c is on

Start with the simple and replace the thermostat and also replace the coolant. The Dex-cool is only good for 150,00 miles or up to 5 years and any thing longer then that, the coolant crystallizes causing a flow restriction throughout your cooling system.
There is a TSB for thew servicing of coolant that needs to be done before replacing the Dex-cool. The cooling system needs to be flushed out to get the crystal deposit out of the system if there is any.
Gm uses Preston radiator flush to clean out the radiator and heater core of any deposit that will restrict the coolant from flowing throughout the system. Once the system has been flushed out, replace the thermostat and replace the Dex-cool with a 50/50 mix of water and Dex-cool for the best result in cooling. Too much water and the coolant will boil over and too much Dex- cool will jell up causing poor circulation.
Thank you for using fixya and good luck

May 31, 2010 | 1998 GMC Jimmy

3 Answers

96 jimmy is making a bubbling sound in the front under the hood close to wall on the passenger side.

Your coolant level is low, and you hear the coolant taking up the vacant areas....bubbling...due to low coolant.

Jan 24, 2010 | 1996 GMC Jimmy

2 Answers

I have a 1999 jimmy with 115,000 miles and I,m hearing about the intake manifolds leaking antifreeze what concerns should i have with my jimmy and what type of antifreeze should I be using

A leaking manifold could cost you a VERY expensive repair. I recommend getting it fixed as soon as you can. And with the antifreeze...seeing how it it a GM it should take DEX-COOL. But look under the hood and look for a white sticker and it should say "This vehicle takes DEX-COOL coolant. Do not mix with any other coolant" and if not the cap for the coolant should say so. If so, then obviously you need DEX-COOL or universal coolant. Universal will not harm anything, but I would use the manufacters reccommendations just on the safe side.

Oct 19, 2009 | 1999 GMC Jimmy

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