GMC Sierra 2500 HD Questions

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Wwipers only work on high it's not a relay or fuse is it the pulse board maybe ?
How long have you had this problem? 1day
when i press the horn nothing i can not control audio system from steering wheel any more
We have alldata, they show us a location of where it should be, however we have searched this truck, top to bottom, and cannot find the fuel pump flow control unit. It is a closed system so how does it monitor the fuel flow?
Horn works normally when truck is cold and not running. Works when truck is started. Stops working as soon as transmission put in D and brake pedal released. Will not work again until truck turned off and cooled down. I have changed the horn relay- no change. What next? Scan tool?
vehicle on its own, just happened out of the blue, with no other concerns.
I turn it off, try again, it may take 2 or 3 times then it will start normal. It sounds like the starter is cranking, but it either doesn't start, or it starts, runs rough for a second, then it runs fine
The brake lights still work but my cruise control has stopped working. The wires are colored but the switch only has the letters A B C D E and F as identifiers for the wires. How can I find out which terminals the 3 broken wires connect tro?
only happens in 4wd lo or hi
I'm trying to change my plug wires and want to make sure they are put on correctly.
Have to turn radio off for 2 to 3 minutes then back on for the scanning to stop
Ran diagnostic and these where results: 1. P0654 ENGINE SPEED 2. P0758 2-3 shift 3.P 2761 TCC/ PCS solenoid 4. U 0107 lost communication 5. U 1041 lossEBCM/EBTCM 6. C0035 LiFT fr SPEED. Had another test run and was told it needs throttle body, & may need more repairs. At estimated $700 or more. Now I'm broke down 800 mls from home and low on cash I need help
Push the peddle and no power.
Trying to fix my ABS breaking system. I need a schematic.
Is there a way to by pass the power steering unit and isolate the breaking system, so they work if the power steering unit goes out? 8100 engine (gas) with Allison Transmission.
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