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GMC Jimmy Tranny Problem?

nthomps66

Asked by nthomps66,

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nthomps66 Enthusiast

nthomps66

Posted
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Can the transmission on my 2000 Jimmy can overheat and shut itself down somehow?

I was pulling my boat last night on 35W. I thought something was wrong because I couldn’t get it up to the speed limit (70mph) which normally isn’t a problem. I turned off the A/C and that did nothing. Then it just started losing speed and finally It wouldn’t go over 30 mph. The engine would rev high RPMs but not go any faster. I thought for sure the tranny was slipping. I unhooked the boat and had a friend take it home for me. I then tried the Jimmy again and it worked fine. I drove it home with no problems.

I drove it to work today too. I don’t know what to do. I might hook the boat back up tonight and see what happens.

I was using the “Tow/Haul” button like usual. The truck's manual says I can pull 4500 lbs. My boat/motor/trailer weighs less than 2800 lbs I believe.

Is it worth fixing or should I trade her in ASAP?

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Dan Thiem Veteran

Dan Thiem

Posted
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GM part # 25180303 sugg retail is $216.00 with a discount it whsles for around $140.00. That's what I came up with for a 2000 Jimmy 4.3W. $380.00 seems a bit steep. Maybe it's more labor intense than I thought.

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Jeremy airjer W Grand Master

Jeremy airjer W

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Mass Air Flow sensor or MAF. Two hose clamps and a four wire connector. Should take about 2 1/2 minutes to replace smile.gif. I used to see alot of these and the GM's back in the late 90's hardly ever see them on the new stuff. Never replaced one on a blazer this new.

nthomps66, Make sure they have duplicated the symptom and are not just firing parts at it!

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Dan Thiem Veteran

Dan Thiem

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Quote:

Make sure they have duplicated the symptom and are not just firing parts at it!

So true Airjer! There is a lot of parts replacers out there calling themselves mechanics. Not very many good drivability and diagnostic techs left out there. Now a days people just start putting on parts untill they get it fixed.

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Macgyver55 Proficient

Macgyver55

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Airjer, maybe I am just "lucky" but I have a Vertronics Mastertech and so far it has been flawless at finding even the most tricky TPS problems. It has a built-in automotive oscilloscope and a built-in digital meter. You can do voltage and current waveform displays and more. I've been around the block a few times, but I'm not saying I never get "fooled". Every one of us has been there.

I have a good old stand alone multimeter too just in case.

I just seem to use it less and less unless there is some question to be verified.

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Jeremy airjer W Grand Master

Jeremy airjer W

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You must be a dealer tech? Lucky!!! There are a few of us that drool over Equipment like the Mastertech & DRB's. To much money for this guy to spend. I've never had any luck with the MT 2500 finding gliches. I recently purchased a Mentor/Genisys and the refresh is still slow but I did get the multimeter/labscope upgrade which makes it convienient. Everything I need in one tool!

Lets see Spend $4,000.00 to figure out that a $50.00 part is bad. Isn't autorepair great! smile.gif

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Macgyver55 Proficient

Macgyver55

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No dealer job for me...they gotta work too hard for their money. smirk.gif

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nthomps66 Enthusiast

nthomps66

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The symptoms were totally gone when I picked it up yesterday. $370 was the total bill for the sensor. Of all the people I got input from, nobody correctly guessed what it was. That means one of two things. Either I am bad at describing the problem or its too hard to diagnose car problems on a messageboard. Probably a little of each...

I drove it exactly one block to New Brighton Ford and traded it in for the big, bad, blue F150 Crewcab I am driving today! It matches the Crestliner and everything. Yesterday could not have turned out any better. The Jimmy was not too bad to fix. I got what I wanted for it. I got a lower interest rate then I expected. I financed less than I thought I would. And I took it home last night. My first new truck ever...pretty exciting.

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Macgyver55 Proficient

Macgyver55

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I am happy and sad at the same time. Happy you got the new truck, (new trucks are always GOOD) but kinda bummed that we will never know if the problem was fixed or not. I'm a "follow up" kinda guy so I'm always interested in outcomes of problems. You had already said that you "tried the Jimmy again and it worked fine (after unhooking the boat) and then "drove it home with no problems." No mention of any problem after that. Driving it exactly one block and trading it in isn't much of a test as to whether it was fixed or not. At any rate, you got your new truck. Somehow I think that outcome was in the cards either way by the sounds of it.

You're right though, it's very tough to diagnose car problems on a message board. It's kinda like calling the doctor and telling him about an ache or pain that comes and goes and having him diagnose it and prescribe a cure over the phone.

I do agree with Airjer, we used to see these fairly often back in the mid to late 90's and hardly ever see them on the new stuff anymore. Haven't replaced one yet on basically anything this new.

Good luck with the new truck, I hope you enjoy it!

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