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Check the tag that is riveted onto the trans case at the right rear, if it is still there it will tell you what the trans case at least is. Unfortunately the real differences are internal and require some disassembly to spot. The main difference is 91-93 used a EPC(elelectronic pressure control...

Did the shop rebuild YOUR trans, or did they give you an exchange unit. I would venture to say 80% of the 4l80e builders don't know that 91-93 has differences vs 94+. We had a GM engineer that worked on the 4l80e design come in here and even he didn't know about the functionality differences...

It works with pcmhammer, it will not work for ls droid since it isn't bluetooth. The only downside is it is SLOW! You can catch them on sale for $20 every now and then...

The 700r4 is a 4l60, definately NOT a 4l80e. You're getting hung up on obd1 vs obd2, alot of that stuff can be interchanged. 4l60e and 4l80e use the same trans crossmember. There are slider motor mount plates to help offset driveline length. There are options, but until the OP figures out which...

The 98-00 black box is a PITA to tune to begin with. Very few tables to work with since it is only a 256kb memory chip vs the 0411's 512(double the memory). And the 0411 can be tuned for under $40. I bought my SX cable for $20 on sale through Amazon and can tune it for FREE using pcmhammer and...

If his truck was a 305 4l60e combo it was essentially a 1500 with a 9.5" rear axle. GM made the light duty 2500 and the regular 2500. Those with a 4l60e would have been a 6 lug light duty 2500 truck. Putting a 4l80e behind a 95 5.0l would be pointless due to how much power it takes to run a...

Partly correct. The vans up to 16 used a prime pump, but it did not run all the time. The van pumps have a bypass built in to them that opens when the pump shuts off after 60-90 seconds of priming after key on. The L5P and newer DOES have an electric lift pump as the Delphi high pressure pump...

You would have to go stand alone controller as the 91-93 6.5l tcm only works with a 4l80e with an input AND output speed sensor IN the trans, AND the early style epc circuit.

The simple answer is it won't work. 91-93 4x4 4l80e's had both an jnput and output sensor in the trans, 94+ 4x4's do not have an output sensor(just a dummy plug to fill the hole) nor do they have the reluctor wheel to even trigger one. So the trans would not shift in 4 low range. Then you have...

Check your boost tube for rubs where it goes by the power steering pump. Are you monitoring rail pressure while driving? How is your air filter? Fuel filter? What is your fuel rate when your checking your balance rates?

Tim had NO part in the tuning, just testing the turbo's(last I talked to him he had never tuned a 6.5l and had loaned out his stuff). Slim was working with somebody here at 1st(one who doesn't want to be named because he left the tuning game for fear of the EPA's heavy hand) and after several...

Welcome to gen 4 tuning, gen 3's did just what you told them.

Yes, it is not an easy swap, and requires custom machining to make work. I know I've said this elsewhere, but it wasn't in my original post on it(which I've remedied). The gmt800 brakes ARE far superior to the gmt400, but for 2 wheel drive guys, it is not an easy bolt on swap Like it is for 4x4...

You need to check it for codes. Stuck in 1st means the PCM ic controlling it as limp mode is 2nd gear. And does your speedometer work? The most common issue for stuck in 1st is a bad output speed sensor not telling it the correct speed.

The GMT800 brake upgrade is NOT an easy swap on a 2 wheel drive, it's not even really possible to swap 800 spindles onto a 2 wheel drive 400 without extensive modifications to the suspension and frame(just updated the op to clarify). Gmt800's all use a knuckle with a hub bearing as GM was...

The 0411 has been used for this many times and is tuneable on the cheap. The black box can also do it, but adjusting the shift points is pretty much out of the question. I've read of people doing this, but I've never personally done it. You will have to hook up a TPS to give it throttle input...

And you could count on 1 hand how many shops specialized in doing these swaps that are quite honestly easy as it is all plug & play. There are alot of people who say they want one, but won't follow through, and then there was the even smaller market of those who actually bought them. If there...

Pee will not work. There is a DEF quality sensor that checks what's in the tank and then the nox sensors in the exhaust check the exhaust going out to see if the reduction is taking place in the exhaust emissions.

The DRW calipers on SRW rotors would eventually allow the caliper piston to come out of the caliper body once the pads got worn down most of the way. I've heard of somebody doing it, but I personally wouldn't do it.

Because it's not needed. I know I have one, but the power is just not needed honestly. The market segment for people that need to tow the kind of weight that calls for a V8 diesel in an SUV is INCREDIBLY small. The diesel in the Burb is being done to boost the un-meetable CAFE standards the...