I'm a GM man all the way, I own five right now, 96 Z71 K1500 Ext cab 5.0L, 99 Silvarado 1500 regular cab 4.8L, 03 Saturn ION, 03 Denali XL6.0L and my toy a 77 vette with a 496 BB. I enjoy working on my own trucks an cars. I recently purchased a scanner cable and software for my laptop so I can see what's going on inside. For my vette I have a LM1 A/F meter with data logging, I've installed a TPS, MAP, RPM converter and the wide band sensor for tuning on the vette. Works great