Performance Oil Pump Timing Chain & Water Pump Kit for Chevrolet Silverado 2500 (1999-2004) 6.0L

High-Durability Oil Pump, Timing Chain & Water Pump Kit for 1999-2004 Chevrolet Silverado 2500 (GMT800)

What it Does: The Performance Oil Pump, Timing Chain & Water Pump Kit refreshes critical front-drive engine systems on the 1999-2004 Silverado 2500 to restore oil pressure stability, eliminate valvetrain timing slack, and guarantee consistent coolant flow.

The Stock Chevrolet Silverado 2500 Timing and Lubrication Vulnerabilities

High-mileage GMT800 trucks powered by the Vortec 6000 LQ4 frequently face oil pressure loss due to internal gerotor housing wear and sticking pressure relief valves. Over extended heavy-load operation, the OEM link-belt timing chain stretches, introducing camshaft timing drift, degraded low-end torque, and erratic cam position readings. Simultaneously, factory water pump bearings and mechanical shaft seals degrade under severe heat cycles, resulting in coolant seepage and thermal runaway.

The Engineering Solution

This front-engine overhaul assembly installs a precision-machined oil pump engineered to maintain rigid hydraulic gallery pressure across high-demand duty cycles. The direct-fit timing set includes a pre-stretched, heavy-duty timing chain with matching cam and crank sprockets to eradicate lash and sync timing events accurately. Matched with a high-flow mechanical water pump engineered with heavy-duty internal bearings and a complete front cover gasket package with crank seal, this kit eliminates front-cover leaks and cooling cavitation.

What's Included

• 1 Oil Pump
• 1 Timing Chain Kit (Chain, Camshaft Sprocket, Crankshaft Sprocket)
• 1 Timing Cover Gasket Set
• 1 Water Pump
• Assorted Seals and O-Rings

Technical Specifications

Compatibility

• 1999-2004 Chevrolet Silverado 2500 Base (6.0L V8 Vortec LQ4)
• 1999-2004 Chevrolet Silverado 2500 LS (6.0L V8 Vortec LQ4)
• 1999-2004 Chevrolet Silverado 2500 LT (6.0L V8 Vortec LQ4)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 Silverado 2500?

Yes, this is a direct fit for the 1999-2004 Chevrolet Silverado 2500 equipped with the Vortec 6000 LQ4 engine. Does not fit models equipped with the 8.1L Big Block or 6.6L Duramax Turbo-Diesel engines.

Do I need to prime the oil pump prior to first startup?

Yes, manually packing or priming the replacement oil pump assembly with clean motor oil prior to timing cover reinstallation is necessary to prevent dry start damage and facilitate instantaneous oil pickup.

The Chevrolet Silverado Heavy-Duty Standard

Engineered for severe-duty commercial hauling and extreme towing demands, this component package restores factory timing integrity and critical lubrication to sustain long-term Gen III small-block operation.