2004 starts and runs fine, It will not allow me to put into park.
Any suggestions short of loading up and taking to someone with a computer?

Post more info on truck. D/A?

04 2500HD Duramax.

Just repaired from a crash. Starts and runs fine.went into forward and reverse before it was completly buttoned up.
But now that all headlights airbags etc.... have been replaced it now will not allow me to move the shift lever from the PARk position.

Sounds like the safety solenoid that won't allow you to take the truck out of park without your foot on the brake. You may not have everything hooked up. If it starts, then it is probably not a security system problem. Someone else will probably have to chime in to help figure out how to trouble shoot this interlock.

will it shift with key on engine off?

No

I agree with smokindmax.

i didn't know there was a solynoid tho. I thought it was just a cable thing.

oh well, i just crawled under mine and it looks like an electrical hook up. check to see if it is hooked up and while there make sure the cable lincage is still hooked up. You can see both conections on the driverside on the allison tranny. if nothing else, unhook and rehook the electrical conection to see if that gets it working.

sorry,I meant will it shift with the key in the accessory position?also check the stop lights,do they work.the stop light switch releases the shift lock solenoid.the solenoid is on the shift cable close to the colu Document ID# 793562
2004 Chevrolet Chevy K Silverado - 4WD Shift Lever Does Not Move with Brake Pedal Depressed

Step
Action
Yes
No
Schematic Reference: Automatic Transmission Shift Lock Control Schematics (http://service.gm.com/servlets/CellHandler?CellId=57465&RefDoc=793562&evc=sm)
Connector End View Reference: Automatic Transmission Shift Lock Control Connector End Views (http://service.gm.com/servlets/CellHandler?CellId=57468&RefDoc=793562&evc=sm) , Automatic Transmission Related Connector End Views (http://service.gm.com/servlets/CellHandler?CellId=7013&RefDoc=793562&evc=sm) or Automatic Transmission Related Connector End Views (http://service.gm.com/servlets/CellHandler?CellId=7575&RefDoc=793562&evc=sm)
DEFINITION: Transmission shift lever will not move out of the PARK position with the ignition ON and the brake pedal pressed.
1
Did you perform the Symptoms - Automatic Transmission Shift Lock Control tests and all the necessary inspection?
Go to Step 2 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S02)
Go to Symptoms - Automatic Transmission Shift Lock Control (http://service.gm.com/servlets/CellHandler?CellId=57472&RefDoc=793562&evc=sm)
2
<LI type=1>Turn ON the ignition, with the engine OFF. <LI type=1>Press and hold the brake pedal.
Attempt to move the shift lever out of the PARK position.Does the shift lever move out of the PARK position?
Go to Testing for Intermittent and Poor Connections (http://service.gm.com/servlets/CellHandler?CellId=62112&RefDoc=793562&evc=sm) in Wiring Systems
Go to Step 3 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S03)
3
<LI type=1>Turn OFF the ignition. <LI type=1>Disconnect the automatic transmission shift lock control switch. <LI type=1>Turn ON the ignition, with the engine OFF. <LI type=1>Press and hold the brake pedal.
Attempt to move the transmission shift lever out of the PARK position.Does the transmission shift lever move out of the PARK position?
Go to Step 6 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S06)
Go to Step 4 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S04)
4
<LI type=1>Turn OFF the ignition. <LI type=1>Disconnect the automatic transmission shift lock control solenoid. <LI type=1>Turn ON the ignition, with the engine OFF <LI type=1>Press and hold the brake pedal.
Attempt to move the transmission shift lever out of the PARK position.Does the transmission shift lever move out of the PARK position?
Go to Step 7 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S07)
Go to Step 5 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S05)
5
Inspect for poor connections at the harness connector of the automatic transmission shift lock control solenoid. Refer to Testing for Intermittent and Poor Connections (http://service.gm.com/servlets/CellHandler?CellId=62112&RefDoc=793562&evc=sm) and Connector Repairs (http://service.gm.com/servlets/CellHandler?CellId=61973&RefDoc=793562&evc=sm) in Wiring Systems.
Did you find and correct the condition?
Go to Step 10 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S10)
Go to Step 9 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S09)
6
Inspect for poor connections at the harness connector of the automatic transmission shift lock control switch. Refer to Testing for Intermittent and Poor Connections (http://service.gm.com/servlets/CellHandler?CellId=62112&RefDoc=793562&evc=sm) and Connector Repairs (http://service.gm.com/servlets/CellHandler?CellId=61973&RefDoc=793562&evc=sm) in Wiring Systems.
Did you find and correct the condition?
Go to Step 10 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S10)
Go to Step 8 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S08)
7
Repair the short to battery positive voltage in the A/T shift lock control solenoid supply voltage circuit. Refer to Circuit Testing (http://service.gm.com/servlets/CellHandler?CellId=62194&RefDoc=793562&evc=sm) and Wiring Repairs (http://service.gm.com/servlets/CellHandler?CellId=61965&RefDoc=793562&evc=sm) in Wiring Systems.
Did you complete the repair?
Go to Step 10 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S10)
--
8
Replace the automatic transmission shift lock control switch. Refer to Stop Lamp Switch Replacement (http://service.gm.com/servlets/CellHandler?CellId=69012&RefDoc=793562&evc=sm) in Lighting Systems.
Did you complete the replacement?
Go to Step 10 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S10)
--
9
Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement (http://service.gm.com/servlets/CellHandler?CellId=57484&RefDoc=793562&evc=sm) .
Did you complete the replacement?
Go to Step 10 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S10)
--
10
Operate the system in order to verify the repair.
Did you find and correct the condition?
System OK
Go to Step 2 (http://service.gm.com/servlets/BlobShtml?ShtmlFile=793562&pubid=437&evc=sm&cellId=57486#S02)
Document ID# 793562
2004 Chevrolet Chevy K Silverado - 4WD mn shifter.....

just to add,the body shop was obviously in the column area.they may have plugged the connector to the shft lock actutator in but it did not snap in all of the way.you shifted a few times which moves the actuator and it disconnects.pull th hush panel and knee bulster,look for a green connector that may be disconnected.should be one on the right side of the column near the column shifter and another on the left side below the turn lever.also try what I mentioned about shifting it in the acc position.this may avoid havibg it towed.