2004½–2007 CHEVY SILVERADO / GMC SIERRA HD · 6.6L DURAMAX LLY & LBZ
LLY & LBZ Duramax upgrades in Tucson: more power that lasts.
These trucks respond well to cooling, fuel and air upgrades. We do them in the right order, cooling first on an LLY, all installed at your location.
- 310–360 hp605–650 lb-ft stock
- Variable turboBosch CP3 pump
- Allison 10005- or 6-speed
- We come to youTucson & nearby
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KNOW YOUR TRUCK
LLY or LBZ? It changes the parts.
The two engines look alike but use different intakes, intercoolers and cooling parts. Your year tells us which parts to bring.
LLY
- 310 hp / 605 lb-ft
- Variable-geometry turbo and EGR
- Smaller cooling system; known to run hot towing
- Allison 1000 5-speed
- VIN 8th digit “2”
LBZ (and late LLY)
- 360 hp / 650 lb-ft
- Larger radiator and updated cooling
- Allison 1000 6-speed
- No DPF yet
- 2007 “Classic” body trucks share it
PERFORMANCE UPGRADES
More power that lasts.
These engines make good power, but heat and the Allison are the limits. We add cooling and fuel first, then air and tuning with the transmission in mind. Gains depend on your truck.
Daily driver & light towing
- Cooling refresh (radiator, fan clutch, thermostats)
- FASS lift pump
- Banks Ram-Air intake
- Gauges for coolant, exhaust temp and transmission temp
- PPE deep Allison pan
Typical result: cooler temps, steadier fuel and better pulling.
Call nowRequest a quoteSerious towing
- Everything in Stage 1
- Mishimoto radiator and intercooler
- Emissions-legal Edge tuning matched to your transmission
- Banks Ram-Air differential cover
- Allison rebuilt with heavy-duty parts
Typical result: strong, steady towing with temperatures under control.
Call nowRequest a quoteUPGRADES BY CATEGORY
Pick a category to see the parts we install.
Tap a tile to see what it does and the parts we install on the LLY & LBZ Duramax. Every truck is different, so call or request a quote for yours.
Radiator, intercooler & transmission cooler
Better cooling is the most important upgrade for these trucks in Tucson heat.
Parts we install
- Mishimoto aluminum radiatorStart hereDirect-fit radiators for 2001–2005 and 2006–2010 Duramax trucks, lifetime warranty.
- Mishimoto intercoolerBar-and-plate intercoolers made for 2001–2005 and 2006–2010 Duramax trucks.
- Mishimoto transmission coolerTowingMade for 2003–2005 and 2006–2010 Allison trucks.
FASS lift pump
These trucks have no factory lift pump. A FASS pushes clean, steady fuel to the CP3.
Parts we install
- FASS Titanium Signature SeriesLift pump with water separation and filtration, made for 2001–2010 Duramax LB7 through LMM.
Banks Ram-Air intake
A better intake lowers exhaust temps and helps the turbo.
Parts we install
- Banks Ram-Air intake (LLY)Enclosed cold air intake made for the 2004½–2005 LLY.
- Banks Ram-Air intake (2006–2007)Enclosed cold air intake made for 2006–2007 LLY and LBZ trucks.
Tuning
Tuning should match the Allison. We confirm what’s available and legal for your truck.
Parts we install
- Edge Evolution CTS350-state legalFlash tuner and touchscreen monitor for 2001–2016 Duramax trucks (CARB EO D-802-13).
- Edge Juice with Attitude CTS3Plug-in tuner and touchscreen monitor with separate versions for the LLY and the LBZ, with exhaust temp safety backdowns.
Transmission & differential
More fluid and better cooling are the first steps for the Allison 1000.
Parts we install
- PPE deep Allison panStart hereCast aluminum pan that holds about 4 extra quarts, with cooling fins and a magnetic drain plug.
- Banks Ram-Air differential coverTowingRear cover for the AAM 11.5-inch axle with air scoops and cooling fins.
Shocks & front end
We don’t do wheel or tire work.
Parts we install
- Bilstein 5100 shocksFirmer, more controlled ride loaded or empty.
- Front-end rebuildIdler arm, pitman arm, tie rods and ball joints with heavy-duty parts.
RELIABILITY FIRST
Known weak points come first.
Before adding power, we make sure the LLY & LBZ Duramax’s known weak points are handled, so the upgrade lasts.
How mobile service worksTell us your truck and where it is, we diagnose on site, you approve a written estimate, and we fix it where it sits.
See how it works →Name-brand partsWe install proven brands like Banks, FASS, Mishimoto, Edge, PPE and Bilstein.
See all the brands we install →OWNER QUESTIONS
LLY & LBZ Duramax performance questions, answered.
Should I tune my LLY?
Fix the cooling first. An LLY that already runs hot will run hotter with more power.
Will more power hurt my Allison?
It can. We match power to the transmission and add cooling, or rebuild it with heavy-duty parts if you want more.
Are your upgrades street legal?
We install emissions-compliant parts and don’t do deletes.
LET’S TALK ABOUT YOUR TRUCK
Call, text or request a quote.
Tell us your year, mileage and what you want done. We’ll recommend the right build, quote it and come to you.