03 yukon w/remote start wont shift to 2nd

Last week I installed a remote start (DEI) on an 03 Yukon with Passlock II. Everything worked fine, but now the customer says that when he remote starts the truck, it wont shift from first to second when he drives it. I'm lost!! I dont understand how remote starting it and driving is any different from starting it with the key once it is off and driving!! Anyone with experience here would be a savior to me... thanks in advance. Dave

make sure you have all the wires hooked up: Make:   GMC Model: Yukon Year:    2003 Alarm Constant 12 volts RED (2) IGNITION SWITCH HARNESS Ignition 12 volts PINK IGNITION SWITCH HARNESS Starter YELLOW IGNITION SWITCH HARNESS Dome Light GRAY/BLACK (+) AT UNDERDASH LIGHT Trunk Pin Switch    Parking Lamp BROWN (+) DRIVERS KICK PANEL ** Power Lock GRAY SEE TECH NOTES Power Unlock TAN FOR DOOR LOCK INFO ** Parking Light Wire Has Also Been Found As A BROWN / WHITE (+) High In Kick Or VIOLET (-) At Headlight Switch Remote Start Tach Signal WHITE AT PCM * #238 Ignition #2 WHITE IGNITION SWITCH HARNESS Ignition #3 ORANGE IGNITION SWITCH HARNESS Accessory BROWN IGNITION SWITCH HARNESS Neutral Safety WHITE (-) PCM CONN C3 PIN #13 * Brake Light WHITE (+) AT SWITCH ABOVE BRAKE PEDAL Reverse Light LIGHT GREEN (+) EITHER TAIL LT ASSY OR TRAILER CONN Rear Window Defrost    *PCM Located On The Drivers Side Of The Motor. Tach Wire Is In The BLUE Conn (C1) Closest To The Firewall,Pin #49. Also Found Back Of Cluster in 24 pin GREY Conn Pin # A12 #238- See G.M. Passlock II Bypass DiagramGood Luck

David

Ace Security

813-376-9778

Tampa

Donate to the 12volt

If the white wire is NOT CONNECTED, it can cause problems such as this. It needs to be powered up as a second ignition wire; from what I understand, it powers the electronically controlled transmission circuits, and doesn't work right if the car is started without it getting power.

its not good to be in "Limp" mode.....Good Luck

David

Ace Security

813-376-9778

Tampa

Donate to the 12volt

i understand, it needs the second ignition wire. what about the third ignition wire, is that gonna cause any problems not being hooked up? thanks for all the help guys... Dave

i would hook all of them up to be on the safe side you can use relays if need be...Good Luck

David

Ace Security

813-376-9778

Tampa

Donate to the 12volt

I don't believe those have a 3rd ignition wire on the vehicle, just the pink one and the white one. If they do, then I'd hook it up, but if you're just referring to the output from the RS, it doesn't need to go anywhere.

You didn't hook up all of your ignitions. Here is the way it works. The computers are looking for everything to turn on in a certain order, so if you miss one of the ignition wires and remote start the car the ecu thinks that the transmission computer is bad. When you start it with the key then everything starts up like normal and works fine, but when you remote start it the car freaks out.Certified Security Specialist

Always check info with a digital multimeter.

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