Product Description
FLEECE FPE-DMAX-CBOP DURAMAX BILLET COOLANT BLOCK OFF PLATE 2001-2017
Cure rear cover coolant leaks and upgrade durability with the FLEECE FPE-DMAX-CBOP Billet Coolant Block Off Plate. Precision-machined from billet aluminum and sealed by an integral square-cut O‑ring (no paper gasket required), this direct-replacement plate eliminates the corrosion and gasket fatigue that plague factory covers on 2001–2017 6.6L Duramax engines.
Key Features
- Billet aluminum construction: Rigid, corrosion-resistant upgrade over cast OE covers.
- Integral square-cut O‑ring: Reliable, reusable seal—no paper gasket to dry out.
- Direct replacement: Replaces GM OE covers (see cross-reference below) for a clean, fast install.
- Fits LB7–L5P (2001–2017): Coverage across core Duramax generations for broad serviceability.
- Leak-stopping design: Stops seepage at the rear engine cover so you can drive and tow with confidence.
Vehicle Fitment
- 2001–2004 Chevy/GMC 2500HD & 3500HD – 6.6L LB7 Duramax
- 2004.5–2005 Chevy/GMC 2500HD & 3500HD – 6.6L LLY Duramax
- 2006–2007 (Classic) Chevy/GMC 2500HD & 3500HD – 6.6L LBZ Duramax
- 2007.5–2010 Chevy/GMC 2500HD & 3500HD – 6.6L LMM Duramax
- 2011–2016 Chevy/GMC 2500HD & 3500HD – 6.6L LML Duramax
- 2017 Chevy/GMC 2500HD & 3500HD – 6.6L L5P Duramax
GM OE Cross-Reference
Direct replacement for GM part numbers: 97941204, 12698239.
Cross-Reference & Related Fleece Products
Pair this block-off plate with these Fleece upgrades available at CPP Diesel:
- Rear engine cover coolant return plug (LML):
FLEECE FPE-LML-CP DURAMAX LML REAR ENGINE COVER COOLANT RETURN PLUG - Turbo thermostat delete plug (for non-water-cooled turbos):
FLEECE FPE-TURBO-THERM DURAMAX TURBO THERMOSTAT DELETE PLUG - Fan extension harness (LML):
FLEECE FPE-HAR-DMAX-FAN-LML DURAMAX FAN EXTENSION HARNESS (LML) - Fan extension harness (L5P):
FLEECE FPE-HAR-DMAX-FAN-L5P DURAMAX FAN EXTENSION HARNESS (L5P)
Installation Notes
- Remove the OE rear cover plate and clean the sealing surface thoroughly.
- Lightly lubricate the integral O‑ring; torque hardware to factory spec.
- No paper gasket required; inspect O‑ring during future service intervals.
FAQ
Will this plate fix the common rear cover coolant leak on my Duramax?
Yes. The billet plate and integral square‑cut O‑ring replace the failure‑prone cast cover and paper gasket to stop leaks at the rear engine cover.
Do I need to use any sealant or a paper gasket?
No. The design uses an integral O‑ring for sealing—no paper gasket or RTV is required when the sealing surface is properly cleaned.
Which Duramax engines does this fit?
It fits 2001–2017 LB7, LLY, LBZ, LMM, LML, and L5P 6.6L Duramax applications (see fitment above).
What GM part numbers does it replace?
It replaces GM 97941204 and 12698239 rear cover block‑off plates.
Is there a Prop 65 warning?
Yes. WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.
Specifications for FLEECE FPE-DMAX-CBOP
| Specifications for FLEECE FPE-DMAX-CBOP | |
|---|---|
| Brand | Fleece Performance Engineering |
| Part Number | FPE-DMAX-CBOP |
| UPC | 670875715875 |
| GTIN | 670875715875 |
| Engine Coverage | GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P (2001–2017) |
| Seal Type | Integral square‑cut O‑ring (no paper gasket required) |
| Material / Finish | Billet aluminum |
| GM OE Cross Reference | 97941204, 12698239 |
| Package Dimensions (W x H x D) | 2.0" x 2.0" x 4.0" (typical product listing) |
| Shipping Weight | Approx. 1.0 lb |
| Shipping Method | Standard ground (calculated at checkout) |
| Warranty | 1‑year limited parts warranty (Fleece) |
| E‑codes | Not applicable |
| Prop 65 Warning | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
