I have a 2000 Cadillac escalade and I just installed a brand new rebuilt transmission on it cause the RPM, MPH gauges would not work along with the little orange light that let's you know what gear your on. Also the CHECK GAUGES light came on. Anyway the suv started running like **** Like when I take off I have to punch in the gas more cause it struggles just to take off as if it was on 4x4 or something. So I paid a lot of money for the rebuilt tranny, installed it and the problem still persists. So I was told it is an electrical problem or a sensor. WOULD ANYONE HAVE A CLUE TO WHAT MIGHT BE CAUSING THIS PROBLEM?? Any help would be deeply appreciated.

Question edited for typos.
Question moved to year / model category.

First start with the overheating. hopefully the water pump isn't failing. This explains how to get airlocks out and get good circulation. When was the radiator flushed?

https://www.fixya.com/cars/r29872074-vehicle_cooling_system_no_heat

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Disconnect neg battery terminal take column apart and look for melted wires and what caused them to melt.

On a vehicle that old,IF that is the original
trans, just pull it & rebuild it

Not worth even diagnosing anything, until you
have a good unit & all the updates done & all
new solenoids

There where many problems with the gauges in this year, pull the cluster out and send it in to be rebuilt.

Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Did you flush the grit out of the transmission cooler and the lines to it? If not you may have ruined a new transmission.

Unfortunately this is all to common a problem in these computer electronic clusters. You will need to call the dealer and find out where they send the instrument clusters for rebuilding in your area. Cost is about $250.00 if you do the removal and installation after repair.

well yes but no,the speedometer signal comes from speed sensor in the transmission then goes through the ecm/pcm via the tcm (transmission control module, then on to your speedo,if the speed sensor goes bad usually the speedometer will work crazy if not at all also the instument clusters also go bad causing failure too find a new tech dude

dont guess go have the car scanned for the trouble codes most auto stores offer service for free

sounds like bad shift solinods . ebay thay cost around $50 . what transmission does the escalade have?

Check the fuses to the cluster chances are that when you got the jump the power and neg cables could of got mixed up and blown out the fuse.GoodLuck keep me posted