1997 - 2002 OBS GM Truck Van 6.5L Diesel Water Pump Replacement (Chevy GMC Hummer)

FULL by the book tear down and diagnosis on water / coolant pump replacement for the GM 6.5L diesel for model year 1997 and up thru 2002 trucks and vans. This EPIC length video contains many sub procedures for everyone including:

- Removal and reinstall of upper and lower fan shrouds
- Removal and reinstall of fan clutch assembly
- Removal and reinstall of serpentine belt
- Removal and reinstall of vacuum pump and pulley
- Removal and reinstall of the AC compressor
- Removal and reinstall of passenger side alternator
- Removal and reinstall of RH side engine accessory bracket
- Removal and reinstall of the engine oil filler tube
- Removal, reconditioning, and reinstall of water pump and backing plate
- Removal and replacement of lower radiator and crossover hoses & clamps

Illustrated on a 1999 Chevy Suburban K1500. While this video is specific to 1997 1996 and up with the high output (HO) cooling redesign (dual thermostats), many of the steps and procedures will apply to earlier 6.5L turbo charged diesels with the older single design including the 1996, 1995, and 1994. Differences on these older years can include having to also remove the drivers side (LH) engine accessory bracket, for example.

This cooling setup was found on many old body style (OBS) Chevrolet, GMC, Holden, and Hummer models including Suburban, H1, Silverado, Blazer, Cheyenne, Sierra, P32, P42, G20, G30, W/T, Yukon, and Tahoe.

The eBay and Amazon search links below are paid links, for which I may be compensated and earn a commission, if you choose to buy the parts and tools shown in this video thru them:

Water pump (NOT with RPO ZK3 on glove box sticker) GM 12456231 / 19168609 - https://ebay.us/ludAcF

Water pump to backing plate gasket GM 12553488 - https://ebay.us/tAp8OY

Lower radiator hose GM 88908961 / ACDelco 26264X - https://ebay.us/ALrdqo or Amazon: https://amzn.to/3gcUlmN

Pulley removal tool - https://ebay.us/oGz84I or https://amzn.to/3iG04Vi

Crossover hose GM 10243629 - https://ebay.us/7rG1zw

Various clamps GM 11570616, 11570388, 12338017 - https://ebay.us/RAnXS4

Schley 61500B Fan Pulley Tool - https://ebay.us/kOnDuk or https://amzn.to/36IqK1A

Cooling fan (9 blades) GM 15992650 - https://ebay.us/YEwYST

Cooling fan clutch (NOT with RPO ZK3 on glove box sticker) GM 15029405 - https://ebay.us/O2EFyd

ACDelco DEXCOOL coolant GM part 12346290: https://ebay.us/LKqtLN or https://amzn.to/3g9cLFj

The fastener torque values are given where applicable, as well as any special adhesives and sealants. While this is a LONG video, it covers ALOT and definitely fixed my coolant leak. My only regret was not having flexible hose clamp pliers (which I bought after making this video for next time) as the factory spring clamps are a PITA with regular pliers. I hope taking the time to record it helps you out as well.

And if I've saved you some $$ here, consider some coins for the coffee tip-jar! https://ko-fi.com/drshock

Chapters:
0:00 - Problem overview
1:46 - Battery cable removal
2:25 - Upper fan shroud removal
4:19 - Problem analysis
5:04 - Fan removal
8:24 - Serpentine belt removal
9:21 - Vacuum pump removal
15:09 - Further problem analysis
16:02 - Resonator & AC compressor removal
21:20 - Passenger side alternator prep
24:00 - Disconnect batteries & alternator
28:12 - Accessory bracket / tensioner removal
34:26 - Disconnect Lower hose
37:48 - Pump removal prep
41:12 - Oil filler tube removal
44:37 - Water pump assembly removal
54:15 - Pump backing plate removal
57:08 - Lower hose removal
59:38 - Lower fan shroud removal
1:07:21 - Replacement part numbers
1:10:24 - New pump to backing plate assembly
1:20:35 - Water pump assembly installation
1:28:24 - Oil filler tube reinstallation
1:30:11 - Coolant crossover hose installation
1:33:31 - Lower hose installation
1:39:06 - Reassembly tips

#drshock #65diesel #dieselsuburban

Disclaimer: DrShock, the alias for the human content creator for this YouTube channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle.