HomeAll RepliesRe: GM’s lack of limited slip differentials (LSD) Re: GM’s lack of limited slip differentials (LSD) Sponsored October 16, 2012 at 12:34 pm #40678 Z15Participant Technical Note – Full size GM Trucks & SUV’s do not use Limited Slip Differentials, those are only used Cars. Trucks and SUV’s use a Locking Differential (RPO G80). G80 Differential, heavy-duty automatic locking rear Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored