20 Most Recent 2006 Hummer H2 Questions & Answers

well first go to GM and ask for RPO look up from VIN learn the engines (day1new) RPO code! first. the dealer can use the engine serial number too. the service manual shows how to find, all VINs engine and tranny seriels. in chapter 1. Gm makes this all so easy so do it. ask them,.

Try putting the transmission in Nuetral and shifting into High not 4 wheel drive. Best of luck

Try taking off the neg battery post and wait. reinstall to reset system and see if that works for you.

I wish I own my Hummer when you asked this question, on my 04 as well 03 H2 ran in the same issue, its a simple but will drive you nuts to fix, maybe this will help anyone with the same issue now. First you have to remove your shifter handle, use a 2nd to the smallest Allen wrench to remove the small nut on the shifter, make sure don't completely take it out, because its small and you can loose it easy while unscrew that nut, once your handle is loose, removed the handle, than in your center console, there is 3 to 4 bolts depends how many is there has to come out, than once remove the center console box you will see 4 more bolts you have to remove, one of the bolts is on the middle, it connect the base to the body closer to your shifter, than you also need to remove the frame that is holding your AC unit as well your radio, I did not take that off but loose enough to pull outva little so you can pull out the center console that is clip under that frame that's holding on your radio and AC unit, once the frame is loose enough you can pull it out slowly so you wont break the plastic frame cover, its nightmare, once you removed the center console frame, your main shifter unit will be that whole shifting box connected to your shifting pole. On the right side by the main unit, you will see 2 thing, one issue is the connecter with 5 wires that goes in the shifting module is been either cut or loose, because Hummer use a such thin wire and as the time goes by each time you shift it either pull the wires up or down because it does move that connector with it, and those wires some will be pulled out with shifting movent out, and somewiir the movent will take its toll and some will be cut in half due to Hummer use plastic to make everything. You could either run a thicker wires and make sure its long enough so its not too tight, that is how those thin wire break, or you can go to Autozone and get a new connector I think is call the Pigtail standard 6 prom, or called shifting solenoid pigtail connector, its already set up, and 5 time thicker wires, just cut the old connector one wire at a time, so cut one than attach to the new connector so you dont get the wire mess up. Than plug it back in and fixed. Also trick to manually unlock your shifter so you can use your H2 before you can fix it, same way to get into the wiring connector by your solenoid, you will see kind of like a button little to the right just under the connector, push that in and shift than release the button, only time you need to shift from park you have to push that button to drive your H2. When putting back your handle, make sure you shift to Drive or lower gear, than put on the handle until it stop, tight the nut and your done, because the handle has a small spring, if you push in the handle than you can push that button on the handle as well if you put too loose, so best way is put it in D or 2 gear, and drop that handle on the pole and enough that you starting to but pressure but stop there and tight it up you should be good, if this long message will help anyone with the same issue.

yes you can. There are many adapters and kits available at your local parts store or on line. Just be sure to look at it well so you are getting what you are looking for.

Some vehicles need the error code to be reset effectively telling the computer that you have fixed the problem.

There is only one plug that goes to your instrument cluster.all the gauges operate with little servo motors you can buy kits on ebay to replace any faulty ones. youtube has a pretty simple video that shows everything you need to access and fix best of luck jeff

remove what we need more information to assist you please resubmit or edit your question

Have you bled all the air out of the system when all that work was done? It's simple. With the engine running, turn the wheel all the way to the right stop and then all the way to the left stop several times. Check the level in the power steering pump to see if it went down any. If it did then there was air in it. top it off if necessary.

Take it to a fancy-pants mechanic boutique that works on fancy-pants pseudoHummers!

CEL light on? Read trans codes and I bet you find the trans speed sensor #1 has failed.

One common issue with these is the internal wiring harness. Replaced many of them. But it really needs diagnosed. Have the codes read.

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Hummer 4wd service light reset Questions & Answers - Fixya

www.fixya.com > Forum > Tags > 4wd service light reset Hummer h2 2003 55000 mill ... service 4wd the liht is on all time Remote the battery wire from the car for 20 ... My 2006 H3 will not come out of 4 wheel drive?

Automatic Transmission Shift Lock Control System The automatic transmission shift lock control is a safety device that prevents an inadvertent shift out of PARK when the ignition is ON. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components: ?€¢ The automatic transmission shift lock control solenoid.

?€¢ The automatic transmission shift lock control switch.

?€¢ The park/neutral position switch.

With the ignition in the ON position, battery positive voltage is supplied to the park/neutral position switch. When the transmission is in the PARK position the contacts in the park/neutral position switch are closed. This allows current to flow through the switch to the automatic transmission shift lock control switch. The circuit continues through the normally-closed switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid, locking the shift linkage in the PARK position. When the driver presses the brake pedal the contacts in the automatic transmission shift lock control switch open, causing the automatic transmission shift lock control solenoid to release. This allows the shift lever to move from the PARK position. Park Lock Solenoid The park lock solenoid is a safety device that prevents an inadvertent shift out of PARK when the key is in the OFF position. The key must be in the RUN position to release the park lock solenoid. The system consists of the park lock solenoid. With the ignition in the ON position, voltage is supplied to the park lock solenoid. The park lock solenoid energizes through a permanent ground unlocking the shift lever. With the ignition in the OFF or ACCY position the park lock solenoid de-energizes and locks the shift lever in the park position. Shift Lever Does Not Move with Brake Pedal Depressed 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 Go to Symptoms - Automatic Transmission Shift Lock Control 2

1. Turn ON the ignition, with the engine OFF.
2. Press and hold the brake pedal.
3. 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 Conditions and Poor Connections in Wiring Systems NO Go to Step 3 3

1. Turn OFF the ignition.
2. Disconnect the automatic transmission shift lock control switch.
3. Turn ON the ignition, with the engine OFF.
4. Press and hold the brake pedal.
5. 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 Go to Step 4 4

1. Turn OFF the ignition.
2. Disconnect the automatic transmission shift lock control solenoid.
3. Turn ON the ignition, with the engine OFF
4. Press and hold the brake pedal.
5. 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 Go to Step 5 Inspect for poor connections at the harness connector of the automatic transmission shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? Go to Step 10 Go to Step 9 6 Inspect for poor connections at the harness connector of the automatic transmission shift lock control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? Go to Step 10 Go to Step 8 7 Repair the short to battery positive voltage in the A/T shift lock control solenoid supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? Go to Step 10 -- 8 Replace the automatic transmission shift lock control switch. Refer to Stop Lamp Switch Replacement in Lighting Systems. Did you complete the replacement?

You would need a scanner or code reader to erase the code. Keep in mind code 455 is for a large leak so it could be something other than the gas cap.