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7.4

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Gen 6 454 Questions

Ok, so my 2000 K2500 454 has spun a main and or rod bearing. Don’t have the tools to do a rebuild. Found lots of Gen 5 454 motors for 600-1200 but can’t find any Gen 6 around me. So main question, can I used a G5 engine in place of my G6? What’s the difference between the two? I’ve heard cam’s...
- 00CrewCab
- Thread
- Oct 18, 2023
- 454 7.4 gen 5 gen 6 gen v gen vi
- Replies: 32
- Forum: Engine Performance + Maintenance
1998 GMC 3500 HD Overhaul - Crew Cab Commercial Chassis GMT-455

1998 GMC 3500 HD 7.4L CA Smog Legal 4l80e Alcoa 19.5 rims Crew Cab Commercial Chassis GMT-455 170,000 mi Originally equipped with a "Western Hauler" style bed. Formally used for over the road agricultural hauling and ranch work. Painted in 2011. Parked and non-opted in 2012 due to transmission...
- motas02
- Thread
- Jul 23, 2022
- 3500 3500hd 454 455 7.4 c3500 c3500hd gmt455
- Replies: 71
- Forum: Street Build Threads
Brakes for towing

I was driving the 92 k2500 doing a dump run going down hill with a load in the back of bed (no trailer) and the truck did not want to stop when I wanted it to. I plan on doing some towing with this truck (dump trailer and possibly short runs with a compact skid steer). So where should I start...
- 92k2500454
- Thread
- Jun 14, 2022
- 454 7.4 brakes towing
- Replies: 70
- Forum: Axles + Brakes
Help! My 7.4 idles low and stalls in neutral - manual trans

Its a 99 K3500 with the factory NV4500 trans (4x4 obviously) that I just bought a week ago. It drove great the first 600 miles and towed my car home on a trailer from a few states away where I bought it. Just this weekend, it started dropping to 350-500rpm when I would push in the clutch or put...
- CarolinaChevyDad
- Thread
- May 28, 2019
- 454 7.4 low idle manual stall
- Replies: 1
- Forum: Engine Performance + Maintenance