Coolant Block Off Plate with O Ring for 6.6L Duramax Chevy GMC (2001-2017)

$25.93
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Details
Brand Model Year Engine Model
Chevrolet Silverado 2500HD/3500HD 2001-2017 6.6L Duramax
GMC Sierra 2500HD/3500HD 2001-2017 6.6L Duramax

✅ Exact Fitment Guarantee | If you are unsure about compatibility, contact us at service@egrperformance.com with your VIN.

  • Coolant block off plate with O ring solves common factory rear housing coolant leak issues for Duramax trucks
  • Fits 2001-2017 Chevrolet Silverado and GMC Sierra with 6.6L Duramax engines
  • Made of thick billet aluminum for 2x longer service life than OEM cast plates
  • Read on for full fitment details, installation steps and product specifications
Shipping Details

Ontario CA / Springdale OH / Newark NJ

Package List

Complete Package Contents

  • 1 x Coolant Block Off Plate
  • 1 x Pre-installed O Ring Seal
Delivery Time

2-5 working days inland in the United States

Product details

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Product Overview

  • Direct replacement for factory coolant block off plate
  • Features built-in O ring seal for leak-free installation
  • Replaces OEM part number 97941204
  • Constructed from rust-resistant billet aluminum
  • Installs using existing factory bolts and hardware

Ideal For

  • High mileage Duramax owners: Solve frequent rear coolant leak failures
  • DIY mechanics: Affordable direct replacement part for routine maintenance
  • Heavy duty truck users: Prevent unexpected breakdowns from coolant loss

Technical Specifications

  • Material: Billet Aluminum
  • Color: Black
  • Fitment Type: Direct Replacement
  • Placement on Vehicle: Front
  • Warranty: 1 Year Limited Warranty against manufacturing defects

Why Choose EGR Performance

  • US based inventory: Fast shipping from domestic warehouses, delivery in 1-6 business days
  • Quality verified: All parts undergo strict pre-shipment inspection
  • Responsive support: Technical support available via service@egrperformance.com
  • Hassle free returns: 30 day return policy for unused parts in original packaging

Installation Information

Installation Difficulty Level

Moderate

Estimated Installation Time

1-2 hours

Required Tools

  • Socket set
  • Ratchet wrench
  • Coolant drain pan
  • Clean cloth

Step-by-Step Installation Overview

  • Drain coolant from radiator to below the level of the block off plate
  • Remove factory bolts and old cast block off plate from the engine
  • Clean mounting surface thoroughly to remove old gasket residue
  • Align new billet block off plate and tighten factory bolts to OEM torque specs
  • Refill coolant, run engine and check for leaks

No printed instructions included. Professional installation is highly recommended. For technical support, contact service@egrperformance.com.

Troubleshooting and Problem Solving

Common Issues After Installation

  • Coolant leak around plate: Mounting surface not properly cleaned or bolts not torqued to spec
  • Low coolant level: System not properly bled after installation

Error Code Solutions

  • P0128 (Coolant Temp Below Thermostat Regulating Temp): Check coolant level and bleed air from system

How to Reset Check Engine Light After Installation

  • Ensure all installation steps are completed correctly and no leaks are present
  • Use an OBD2 scanner to clear stored error codes
  • Disconnect battery negative terminal for 10 minutes if no scanner is available
  • Start engine and verify light is off, test drive to confirm no recurring codes

What to Do If Your Vehicle Loses Power After Installation

  • Check coolant level immediately, top off if low
  • Inspect for coolant leaks around the block off plate
  • Verify all electrical connections near the installation area are properly seated
  • Run OBD2 scan to identify any active error codes

Core Advantages

  • Leak-proof design: Built-in O ring eliminates gaps, reduces leak risk by 90% vs OEM gasket designs
  • Durable construction: Billet aluminum is 30% thicker than stock plates for extended lifespan
  • Hassle-free installation: No modification needed, uses all factory mounting points
  • Rust-resistant: Black coated aluminum resists corrosion for long term performance

Complete Package Contents

  • 1 x Coolant Block Off Plate
  • 1 x Pre-installed O Ring Seal

Long-Term Maintenance Tips

  • Coolant system inspection: Every 10,000 miles, check for leaks around the block off plate to prevent coolant loss
  • Coolant flush: Every 50,000 miles, replace coolant per manufacturer specifications to reduce corrosion risk
  • Bolt torque check: Every 30,000 miles, retighten mounting bolts to OEM specs to maintain proper seal

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Vehicle Fitment

  • Compatible with 2001-2017 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax
  • Compatible with 2001-2017 GMC Sierra 2500HD / 3500HD 6.6L Duramax
  • Not compatible with non-Duramax gasoline engine models
  • Contact us with your VIN for free fitment verification if you are unsure
  1. Dispatch Time: Orders will be shipped within 24 hours after successful payment.
  2. Delivery Time: 2-5 business days after dispatch (delivery speed depends on proximity to warehouse location).
  3. Return Window:7 days for unsatisfactory items45 days for quality-related issues
  4. Refund Processing: Refunds will be processed back to your original payment method within 2-4 business days after receiving the automated refund confirmation email (subject to bank verification).

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Will this fit my 2005 Chevy Silverado 2500HD with 6.6L Duramax?

Yes, this block off plate is compatible with all 2001-2017 Chevy Silverado and GMC Sierra 2500HD/3500HD models with 6.6L Duramax engines.

Does this include the mounting bolts?

No, this kit uses your existing factory mounting bolts and hardware for installation.

Is this a direct replacement for GM part number 97941204?

Yes, this plate is a direct replacement for OEM part number 97941204.

What material is this made from?

This block off plate is constructed from high quality billet aluminum with a black rust-resistant coating.

How long will this part last?

With proper installation and maintenance, this billet aluminum plate will last significantly longer than the original cast OEM plate.

Do I need to modify my engine to install this?

No modifications are required, this is a direct fit replacement for the factory block off plate.

Does this come with installation instructions?

No printed instructions are included, professional installation is highly recommended. You can contact our support team for installation guidance if needed.

What is the warranty on this part?

This part comes with a 1 Year Limited Warranty against manufacturing defects.

How long does shipping take?

Orders ship from our US warehouses within 1-2 business days, and delivery takes 1-6 business days depending on your location.

Can I return this part if it doesn't fit my truck?

Yes, unused parts in original packaging can be returned within 30 days of delivery. Contact our support team for return instructions.

Will this stop the common coolant leak on my Duramax?

Yes, the built-in O ring seal design eliminates the common leak issues associated with the original OEM cast plate and gasket design.

Is the O ring included with the plate?

Yes, the O ring seal is pre-installed on the block off plate for your convenience.

Do I need to drain my coolant before installation?

Yes, you will need to drain the coolant to below the level of the block off plate to avoid spills during installation.

Can I install this myself if I have basic mechanical skills?

While it is possible for DIY mechanics with moderate experience, we always recommend professional installation to ensure proper fit and seal.

Is this compatible with LML Duramax engines?

Yes, this plate is compatible with all 6.6L Duramax engine variants from 2001-2017, including LB7, LLY, LBZ, LMM and LML models.