Enjoy free shipping on all orders over $100 *
Diesel Truck Parts And Accessories

2001 - 2004 Chevy/GMC 6.6L LB7 Duramax

In 2001 GM introduced the 6.6L LB7 Duramax to the diesel industry, sending a b message to Ford and Dodge that they were now a contender in the light duty diesel truck market. With an available Allison ... read more

Suspension & Steering

Wheels & Tires

In 2001 GM introduced the 6.6L LB7 Duramax to the diesel industry, sending a b message to Ford and Dodge that they were now a contender in the light duty diesel truck market. With an available Allison 5-speed automatic to back it up, the LB7 has proven not only to be reliable but also capable of tremendous horsepower and torque gains. At Diesel Power Products we can help you achieve your goal for your truck no matter what that might be. Search the categories below for all of your LB7 Duramax Diesel Performance needs. If you need help deciding which parts are right for you don't hesitate to call.

Attention: If you have a GM Duramax please verify your engine type before ordering any product. You will either have an LML, LMM, LB7, LLY, or LBZ motor, many of the products we offer are not interchangeable with the varying engines.

To verify, check the 8th digit in the VIN number:
-If it's a 1 you have the LB7 motor and it is covered by the model years 01-04
-If it's a 2 you have the LLY motor and it is covered by the model years 04.5-05

Products in this section are designed to work on 2001, 2002, 2003 and 2004 6.6L GM Duramax equipped trucks unless otherwise noted.

We get a lot of calls and e-mails each day with various product, vehicle, and installation questions. Some are completely off the wall and can even catch us off guard at times, but many others are fairly routine, so we thought we'd post some of the most popular questions that can hopefully be a good resource for you.

Q: I have an EFILive AutoCal from another Duramax. Can that same tuner work on my LB7 Duramax?
A: In short, yes! Autocals get linked to the tuners computer so if you are not getting the same company's tunes, you must get it unlocked first by the original tuner so it can be locked to the new tuner. After that, a new VIN license must be purchased to open up a slot on the tuner. And tunes must be purchased for the new vehicle. They would be sent to your e-mail along with instructions to load them onto the tuner.

Q: I'm looking at an exhaust kit on your website, but it doesn't state which cab and bed configuration it fits, will this fit my application?
A: In most cases, unless it is specifically stated as fitting a certain configuration, all exhaust kits on our website will fit all cab and bed lengths. Further, most kits will not fit cab and chassis applications unless otherwise noted.

Q: I'm looking at this 5" (or other) exhaust kit, but my truck only has a 4" exhaust now. Does this 5" exhaust include an adapter / reducer?
A: Yes, the exhaust systems we sell will adapt down to fit the application at the designated starting point (turbo back, cat back, DPF back, etc.) for a hassle free installation.

Q: What are EGT's?
A: EGT stands for Exhaust Gas Temperature, which is the temperature of the exhaust leaving your engine. This measurement is typically measured before the turbo to ensure you are not overheating components. For most applications, we recommend not exceeding 1300 degrees.

Q: Do you offer smoke and lope tunes with any of your preloaded EFILive AutoCal options?
A: No we do not. In short, both smoke and lope tunes create these results at the expense of the overall reliability of your engine. The tuning companies we have chosen to partner with are top notch and are most intested in creating increased power, fuel economy, and overall drivability. We at Diesel Power Products invest a substantial amount of time and effort to ensure that the products we recommend are in the best overall interests of our customers and their trucks, and unfortunately, these types of tunes do not align with that overall goal.

If you've got a question about your Duramax, feel free to give us a call at 888-99-DIESEL and we would be happy to assist.

Not Available