Chevy S-10 Blazer and GMC S-15 Jimmy SUV High Output Alternators

Made with top quality components since 1985

GM Delco-Remy type Recommended Alternator Upgrades for these vehicles
Click on name below for more info

10Si Series
12Si Series
CS144 Series
AD244 Series

From Wikipedia:

The Chevrolet Blazer (4WD model T-10) and the similar GMC S-15 Jimmy (4WD model T-15) are mid-size SUVs from General Motors . Production began alongside the larger K5 Blazer and Jimmy in 1983 and lasted through 2005. In the United States retail sales after 2004 were limited to two-door Blazer models, all other models being sold to fleets, until April 20, 2005. In the Canadian market, four door models of the Blazer and Jimmy were sold until the 2004 model year and until the 2005 model year for the two door models of both.

The S-series SUVs, so named because they were based on the Chevrolet S-10 and GMC S-15 pickup trucks, were produced in Pontiac, Michigan ; Linden, New Jersey ; Moraine, Ohio ; Shreveport, Louisiana ; and So Paulo, Brazil (the Brazilian version is based on the second-generation S-series; even though production ceased in the U.S., new Blazers are locally produced in Brazil with their own sheetmetal stampings). In North America, the Moraine plant produced only 4-door vehicles, with both 2 and 4 door models being produced at Linden, which was the main assembly plant after the switch (some time after 1995) from Pontiac, Michigan , which is now a full-size truck plant.

red blazer



10Si Series and 12Si Series Alternators (1983-1986)



vehicle engine bay

Chevy Blazer and GMC Jimmy 10Si/12Si Series Alternators

From 1982 till the first production of 1986, GM used Delco 10Si series alternators . Components simply screw in and can be replaced easily, making this alternator easily rebuildable. They can also be replaced by our CS144 series alternator . In the second production of Chevy Blazer and GMC Jimmy vehicles in 1986, GM switched to the Delco CS130 series alternator .



CS130 and CS144 Series Alternators for Chevy S-10 Blazer and GMC S-15 Jimmy (1986-1994)



The transition in 1986 to the CS130 series alternator was not smooth. The units are small, with an underpowered fan. Bearing placement was also an issue, as the voltage regulator heatsink dumped heat directly into the rear bearing. To solve these problems we invented the "Iceberg" Finned CS130 Housing . It acted as a heatsink to draw rectifier heat away from the bearings and out of the alternator. This works to a point, but we recommend upgrading the CS130 to the CS144 in high output applications .





Upgrading the CS130 Leads to the CS130D Series Alternators (1994-2005)



The CS130 's faults were attacked when Delco developed the new CS130D . The CS130D was larger, had more airflow, and was less susceptable to torquing the rotor. It used a new voltage regulator not compatible with those found in the CS130/CS144 . The CS130D showed up in Chevy S-10 Blazers and GMC S-15 Jimmy's running from 1994-2005. We recommend using only the new AD230 and AD244 Series alternators . The AD230/AD244 largely resembed the CS130D series alternator . We actually recommend upgrading your CS130D to the larger AD244 truck alternator . Large diameter alternators produce more power at lower RPM and have a larger thermal mass for heat dissapation.