Trucktok 2001-2004 Chevy GMC Duramax LB7 5-Position SOTF Switch

2013 GMC Denali HD. The beauty of SOTF on the LML is flexibility. Dealer visit? Turn to stock position before you pull in. Towing the boat? Click to tow. Want to embarrass a Powerstroke? Click to performance. The switch communicates with the ECM instantly — no lag, no hesitation. The LML CSP5 mapping is mature and stable. This TruckTok switch comes pre-wired with the correct length to route from the dash to the ECM connector behind the glovebox.

2015 Silverado 2500. The LML with EFI Live CSP5 and this switch is a completely different truck. I run stock, tow, street, performance, and an emissions-intact tune for inspection day all on one switch. The install is clean — the knob uses a factory blank next to the trailer brake controller. The detent between positions is firm enough you will not accidentally bump it. If you have an LML with EFI Live, this switch is a must.

2010 GMC Denali HD. I mostly just use two positions — tow and street — and the SOTF switch is still totally worth it. Pulling a 14K-pound fifth wheel in the tow tune then clicking to street at the campground exit is something you appreciate every single trip. No pulling over, no waiting for a reflash, no laptop on the passenger seat. The switch has been flawless for 60K miles. Zero contact issues, zero intermittent tune drops.

2008 Silverado 3500 LMM. Deleted the DPF, added EFI Live, and installed this SOTF switch. The 5-position rotary is smooth with a nice weighted feel. The LED changes color per position so you always know which tune you are on at a glance. Switching from a 30-hp tow tune to a 150-hp race tune in the middle of a pull is addictive. The kit includes everything — switch, mounting bracket, wiring harness, and ECM connector pins.

2007 Silverado 2500 Classic. The LBZ is the holy grail Duramax and this SOTF switch makes it even better. I run stock, tow, street, hot street, and max effort on the five-position dial. Switching from tow to street after dropping the trailer takes one click while cruising at 70. The wire harness is plug-and-play into the ECM and the switch fits in the factory cubby below the radio. Best mod on my LBZ besides the lift pump.

2003 GMC Sierra 2500. The switch mounts in one of the blank plates in the dash and looks like it came from the factory. The knob is machined aluminum with a smooth rotation and firm clicks between positions. It comes with an LED that matches the factory gauge cluster color. My tuner set up EFI Live with five custom tunes and I can switch between them without even lifting off the throttle. Night and day difference from the old reflash routine.

2002 Silverado 2500. The LB7 ECU is old-school and I used to have to pull over and reflash every time I went from towing to daily to performance. This TruckTok SOTF switch gives me five positions on a rotary dial — stock, tow, street, performance, and race. Switches seamlessly while driving. The knob has a solid detent feel and the install is clean with a flush mount bracket you can put in the dash or console.

2005 Silverado 3500. The LLY uses a key-lock style SOTF switch that integrates with the ignition key position or a separate key cylinder. This TruckTok kit comes with a billet aluminum key switch that sits in a dash blank. Turn the key to select your tune — feels like starting the truck but it is changing power levels. Five positions, positive clicks between each one. My EFI Live tuner had the CSP5 mapping ready in 10 minutes.

2005 GMC Sierra. I prefer the key-lock style over the rotary knob because there is zero chance of bumping it into the wrong position. Each position requires a deliberate turn. The key cylinder is sealed against dust and moisture and the contacts are gold-plated for long-term reliability. 50K miles on this setup and the switch still has crisp detents on every position. Pair it with a well-mapped CSP5 tune stack and you will wonder how you lived without SOTF.