GM AD244 High Output Alternator Updrade - 05-03-08

The GM AD244 was an optional high output 130amp alternator available on full-size trucks from 1999 to 2003 or so. It is reported to put out 80+ amps at idle speeds (some say 100 amps) which blows away the stock CS130D alternator that puts out only 40 amps at idle.The AD244 is true plug and play to. It used the same mounting and electrical conections as the stock s-series alternator. The only acception being the belt which needs to be 1" longer. I want to give credit to a couple forum threads and their authors for doing the research and experimentation to discover this easy plug and play mod: ZR2USA.COM and S-10CREWCAB.COM

I paid $50 for the AD244 I got out od a 2000 Silverado at a local salvage yard. It came with a 6 month warranty. I took it up to Advance Auto Parts and had them test it before putting it on and it tested good. I bought a 6-groove Dayco Belt #5060970 which was 97 5/8" long, exactly one inch longer than the stock belt of 96 5/8" long. An ACDELCO Part # 6K970 should be 97 5/8" also. I tried hard to fit the stock belt over the AD244's pulley but it just would not go. I thought there might be enough play in the belt tensioner, but no way. Have to get the bigger belt.

Below are the photos. The clean new looking one is my stock rebuilt one. Funny that a dirty salvage yard alternator works better! The larger dirty one is the AD244 High Output Alternator.

Below is my stock CS130D rebuilt alternator

Below is the AD244 HO alternator installed.

Here is a top view:

Another angle:

And one more:

Here is the belt:

After a couple days of driving with it installed, everything with it looks just fine. Its putting out a remarkably steady 14.2 volts. I will update here if any problems would come up with it.

This mod saved me from the expense of buying a $300+ after market high output alternator from Powermaster or Nations. If you need more than 130 amps, this would be the alternator build. There is even a 145 amp version of the AD244 available stock on the 2004 Escalade.

Modifications Performed to Date:
5.7 V8 Conversion (Chevy crate engine L31-R Vortec 5.7)
Patriot Headers
Canton 7-Quart Custom Oil Pan
ProComp dual 12inch Electric Pusher Fans (UPDATE: REMOVED)
ProComp dual 10inch electric Puller Fans (UPDATE: REMOVED)
Flow Kooler Water Pump Disc
Body Lift 2 inch Performance Accessories
K&N High Flow Air Filter
Air Filter Box - cut off and removed lower portion
New Tail Lights
33x12.5 BFG AT KO's
Stereo Hack, line in added for MP3 Player
Updated Door Speakers
Flares and Bumper Painted - Duplicolor Bed Liner
Throttle Body Diffuser Removal 04-15-08
5.7 thermostat housing / water neck and high flow thermostat 05-03-08
Corvette Radiator installed to the forward position 05-03-08
Ford Taurus dual speed efan 05-03-08

ZR2

Planned Modifications for the Future:
B&M Electronic Shift Improver (PURCHASED)
Torque Strap
Nerf Bars or Rock Sliders
ZR5 Rims
Spare Tire Drop Down Kit
Knaffle Shackles
Wheel Spacers (rear)
Tachometer Fix
Dual Exhaust (Flowmaster?)
Fog / Driving lights to replace tow hooks
Cowl Hood

ZR2 MIKE's 5.7 V8 BlaZeR2 - Page 5

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