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Chevrolet Silverado 2500 Questions

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Old battery died. When I replaced it today, the truck is trying to start by itself. It does this as I am putting the ground wire on. I immediately unhook the battery. How can I fix this?
DOES NOT MATTER HOW LONG TRUCK SETS AND RUNS. ONLY FREEZING COLD AIR. DRIVER SIDE OF RADITOR IS HOT. PASSENGER SIDE IS COLD. TOP RADITOR HOSE IS HOT. BOTTOM RADITOR HOSE IS COLD.
Hi I used my computer on my truck and got a code PO756. I first noticed my tranny not shifting correctly so checked the fluid it was low topped it off ran fine then did it again same thing reverse was sluggish then first was sluggish checked the fluid it was low topped it off again then it did the same thing reverse was sluggish but drive seemed fine till I got around 45mph then wouldn't shift noticed I had a leak so I used bars leak for transmission put that in topped it off with fluid shifted fine in drive till I had to slow down then wouldn't shift at 45mph got home next day went to back up heard a clunking sound backing up drove it same thing used my computer on it gave me codes PO756 and PO730 which said 2-3 transmission solenoid problems no 1-2 gear the other code was incorrect gear ratio so erased the codes nothing changed same problems now it acts like there is no reverse if I park on a little hump and hit reverse I can back up for a little ways but revs up high took it for a drive keep getting the same codes. Does that mean I will need to replace the transmission solenoid and if so will it fix reverse?
My truck won't run if the map sensor is plugged in but if I unplug it it runs prefect. If i plug it in when it's running it will go dead like it runs out of gas And won't start back until I unplug it. No check engine lights. Also I noticed the oil pressure gauge started going out around the same time
sometimes when I start it up it idles rough and if given gas it acts as if it is getting way to much fuel or not enough, and continues to happen when I put it in gear; then engine light starts to blink, and can smell gas. It stops, but I am concerned and want to fix it. I like to work on my own stuff. please respond.
I am concerned with getting better gas mileage and doinf light work with my truck
I would like to have scheduled maintenance done with my truck on a regular basis.
This happens almost every time I use my brakes.
NEW BATTERY IN FOB, OPENS SOMETIMES AND THE WILL LOCK BY ITS SELF WHEN IM AWAY FROM TRUCK. HAVE READ IT HAS 4 RELAYS AND FUSES. MAYBE A ACTUATOR OR NOT??/ CONFUSED... THANK YOU
I jumped the low pressure switch and compressor runs fine so I replaced switch yesterday. Today same bullshit are these switch known to fail a lot?
The gear catches, but when I accelerate backwards there is a grinding sound an no motion, is it a solenoid problem or is it something entirely different?
Having a little difficulty putting into park. Once I can get it in park, the key does not want to come out. If I leave it in, it is not completely turned off and it drains the battery. Acts like it is not recognizing that it is in park. Not sure what the root problem is???
keep adding power steering fluid when gets empty or when makes sound when turning and or driving.
makes noise when driving
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