GarryHarris

I just added cruise to my 2007 Silverado (GMT900 07-13). 1) Download service bulletin PIT4844H Adding Cruise Control (RPO K34). At this point, you can either take it to a dealer, an Auto Shop or install the parts yourself then have the BCM reflashed. A dealer will not reflash your BCM unless they install all your GM parts. 2) Locate an Auto Shop that maintains a subscription to TIS2Web. The Auto Shop will need to reflash your BCM. I believe ACDelco permanently records the added RPO into its records. 3) Locate an online GM Wholesale Parts site and purchase the following parts: Regardless who installs the parts, you must KEEP THE RECEIPTS. 3a) 25966963 Steering Wheel SIR Coil (Clock Spring) 3b) 25807859 Steering Column Wiring Harness (-JL4 Active Brake) 3c) The Steering Wheel is discontinued so find a used one or add the switch to your steering wheel. If you find a used steering wheel skip 3x, 3y, 3z. 3x) If you add the cruise switch to your existing steering wheel, you also need 25776048 Steering Wheel Wiring Harness from the GM Wholesale Parts site. Its the harness that connects to the cruise switch. 3y) Purchase a Cruise Switch. The Cruise Switch is sold in many places online. 3z) Look on YouTube how to modify your steering wheel with a Dremel. Its not as hard as it sounds. 4) Purchase a Stop Lamp Switch. These are infamous for going bad so assume yours is bad too. When it goes bad, cruise does not work but the brake lamps work. If you don't have cruise, you will never know. 5) Watch the many YouTube sites to help you install the harnesses and steering wheel. Start with 1A Auto. 6) Install a 2a fuse between LBEC terminals K1 (DK BRN) and K2 (YEL). The LBEC terminal block is the fuse panel on the drivers side of the IP. Open the Driver door. Take the LBEC out and put a fuse on the back side of the panel between those wires. You can a) splice a fuse holder leads between the two wires or b) terminate a fuseholder leads into K1 and K2 using 15304711 terminals or c) do nothing at all. This powers the Cruise symbol in the IP. I spliced the wires a) more to the center of the IP so I could access the fuse if needed to in the future. 7) To Reflash the BCM, the Auto Shop will need to call the Techline Support Center number listed on PIT4844. They will only talk to a Technician. They will not talk to you. The Auto Shop will be asked for a receipt of your parts. The Auto Shop may want to claim that they installed the parts. Techline will give the Auto Shop a VCI number to enter into the flash tool. Note: In my case, Techline asked the Auto Shop Tech what the kit number was. I believe there's no such thing. Even the dealer and Wholesale Parts people had no idea when I followed up later. Perhaps its the VCI number that Techline was responsible for issuing or a bug in the instructions. In the end, Techline gave the Auto Shop Tech a kit number).