Sealed H1134CPA 20 engine piston for the 2007 GMC Sierra 2500 HD Classic V8 8.1L and other vehicles seals the cylinder and passes combustion force to the connecting rod. This hypereutectic cast piston set is 0.020 inch oversize.
- Helps improve cylinder sealing for less blow-by
- Retains standard ring gaps in the top groove
- DUROSHIELD skirt-coated piston
- Moly-graphite coating extends engine life and reduces friction for higher fuel economy
- Prevents damage from inadequate lubrication on start-up
Quick facts
- Part: Sealed H1134CPA 20 engine piston
- Fits: 2007 GMC Sierra 2500 HD Classic V8 8.1L and other vehicles
- Material: Hypereutectic
- Condition: New
A worn piston can show up as blue exhaust smoke from burned oil, lost compression or an engine knock. Worn rings, a leaking head gasket or a worn cylinder bore can be behind those signs too, so find the cause before you buy pistons.
Fits
As a V8 8.1L engine piston set, it also fits the 2007 GMC Sierra 3500 Classic V8 8.1L and the 2004-2006 Chevrolet Avalanche 2500 V8 8.1L. Each cylinder gets one piston, so the V8 8.1L takes eight. If your vehicle is not one of these, run its year, model and engine through the "Vehicles it fits" section.
Specifications
Fit and size
- Quantity per vehicle: 8
- Bore diameter: 4.2500 in
- Oversize: 0.020 in
- Piston pin outside diameter: 0.9455 in
- Compression height: 1.350 in
- Top compression ring thickness: 1.50 mm
- Second compression ring thickness: 1.50 mm
Build and materials
- Type: cast piston set
- Piston material: Hypereutectic
- Skirt coating: DUROSHIELD
- Condition: New
- Country of origin: India
In the box
One cast engine piston set. Assembly lubricant is not included.
Interchange: P3181.20 · P3077(8)020
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Does the Sealed H1134CPA 20 piston set fit the 2007 GMC Sierra 2500 HD Classic V8 8.1L?
Yes. Sealed H1134CPA 20 fits the 2007 GMC Sierra 2500 HD Classic with the V8 8.1L, which takes eight pistons, one per cylinder.
Is assembly lube included with this engine piston set?
No. Assembly lubricant is not included, so this set arrives as the cast pistons only.
What bore size and oversize is the Sealed H1134CPA 20 piston?
Sealed H1134CPA 20 has a bore diameter of 4.2500 inch and is 0.020 inch oversize. The piston pin outside diameter is 0.9455 inch.
Do these hypereutectic pistons have a skirt coating?
Yes. The skirts carry a DUROSHIELD coating, and a moly-graphite coating reduces friction and helps prevent damage from inadequate lubrication on start-up.
Does P3181.20 interchange with this piston set?
Yes. P3181.20 is listed as an interchange number for this piston set, along with P3077(8)020.
