Product Description
Stop the leaks and take the heat out of your Allison with the FLEECE FPE-TL-LB7-LLY heavy-duty transmission cooler lines for 2001–2005 LB7/LLY. This complete, high-flow, flexible line kit replaces failure-prone factory hard lines and includes the fittings you need for stock or Setrab-equipped radiators—ideal for towing, work trucks, and daily drivers.
Why these lines
- Heavy-duty, abrasion-resistant flexible hoses with OE-grade fittings
- High-flow routing improves temperature control under load
- Complete kit for stock radiator or Setrab aftermarket radiators
- Direct fit for 2001–2005 LB7/LLY with Allison 1000 (5-speed)
Fitment
Vehicles: 2001–2005 Silverado/Sierra 2500/3500 HD with 6.6L Duramax LB7/LLY and Allison 1000 (5-speed).
Notes: If you have a 2006 LLY with the 8th VIN digit “2” and the 10th digit “6”, use kit FPE-TL-LBZ-LMM instead (see Cross-Reference).
Kit contents (typical)
High-flow cooler lines, 7/8"-14 and 3/4"-16 O-ring to -10AN fittings, 1/2" NPT to -10AN fittings, M22x1.5 Setrab fittings, large OD washers, double hose clamps, locking cable ties.
Cross-Reference / Related Fleece Items (CPP Diesel)
- FLEECE FPE-TL-LBZ-LMM (2006–2010 LBZ/LMM)
- FLEECE FPE-TL-ST (Setrab to -10AN fittings)
- FLEECE FPE-TL-LB7-LLY-SHORT-SER (Short replacement line)
- FLEECE FPE-TL-LB7-LMM-MED-SER (Medium replacement line)
- FLEECE FPE-TL-LB7-LMM-LONG-SER (Long replacement line)
Yes—this kit replaces the OE hard lines with heavy-duty flexible lines and correct fittings to eliminate common leak points.
Do I need special fittings for an aftermarket radiator?
If you run a Setrab-equipped radiator, use the included M22x1.5 fittings or add the FPE-TL-ST Setrab adapters (linked above) for best fit.
Is tuning required after installation?
No tuning is required. This kit is a direct plumbing upgrade and does not change transmission calibration.
Prop 65
California Proposition 65 applies; see table below for details.
Specifications for FLEECE FPE-TL-LB7-LLY
| Attribute | Value |
|---|---|
| Brand | Fleece Performance Engineering |
| Part Number | FPE-TL-LB7-LLY |
| UPC | 635909311003 |
| GTIN | 00635909311003 |
| Compatibility | 2001–2005 GM 2500/3500 HD, 6.6L Duramax LB7/LLY with Allison 1000 (5-speed) |
| Cross Reference | FPE-TL-LBZ-LMM; FPE-TL-ST; FPE-TL-LB7-LLY-SHORT-SER; FPE-TL-LB7-LMM-MED-SER; FPE-TL-LB7-LMM-LONG-SER |
| E-codes | Not applicable |
| Shipping Method | Standard ground (small parcel) |
| Package Dimensions / Weight | Not specified |
| Country of Origin | USA (as commonly listed) |
| Prop 65 | Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
