2008 Hummer H3 Electrical Parts

This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator. Read more

24 Alternator / Generator parts are listed for the 2008 Hummer H3, from PURE ENERGY, TERREPOWER, FVP and 7 other brands. GM GENUINE 25925948 carries the "Popular" badge.

In the New grade, GM GENUINE, TYC, WAI GLOBAL and 5 other brands supply 13 parts: brand-new units rather than rebuilt ones. A representative part number is GM GENUINE 25925948.

In the Remanufactured grade, BOSCH, FVP, PURE ENERGY and 3 other brands supply 11 parts: factory-rebuilt units with new wear components. A representative part number is ACDELCO 3342956A.

This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery. Read more

This group shows a single part: FULLRIVER FT82534.

This table covers the clamps and brackets that secure the battery. Read more

One part is listed for the 2008 Hummer H3 — DORMAN 390030.

This table covers the terminals and clamps that connect cables to the battery posts. Read more

3 Battery Terminal parts for the 2008 Hummer H3 come from 2 brands — DEKA and GM GENUINE. Every part fits both the 3.7L L5 and the 5.3L V8.

Part numbers include DEKA 00350, DEKA 01056 and GM GENUINE PT1116.

This table covers the body-control modules that run lighting, locks and wipers. Read more

One part is listed for the 2008 Hummer H3 — DORMAN 502023.

This table covers the engine-control modules that run fuel, spark and emissions. Read more

GM GENUINE supplies both parts for the 2008 Hummer H3. All of them fit every engine offered in the 2008 H3.

This group includes GM GENUINE 12678511 and GM GENUINE 19421503.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

9 Fuse parts for the 2008 Hummer H3 come from LITTELFUSE. The "Popular" part is LITTELFUSE MIN20. Every part fits both the 3.7L L5 and the 5.3L V8.

In the 10 Amp grade, LITTELFUSE supplies 1 part: grouped under the catalog's "10 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE LMIN10.

The 125 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "125 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE MEG125 is listed in this group.

The 15 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "15 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE MIN15 is listed in this group.

The 20 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE MIN20 is listed in this group.

In the 25 Amp grade, LITTELFUSE supplies 1 part: grouped under the catalog's "25 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE MIN25.

In the 30 Amp grade, LITTELFUSE supplies 2 parts: grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE JCAS30.

The 40 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "40 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE JCAS40 is listed in this group.

The 60 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "60 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE JCAS60 is listed in this group.

Part numbers include LITTELFUSE MIN20, LITTELFUSE LMIN10 and LITTELFUSE MEG125, among others listed above.

This table covers the horns mounted in the front of the vehicle. Read more

This group shows a single part: GM GENUINE 84594590.

This table covers the key fobs that lock, unlock and start the vehicle. Read more

2 Keyless Entry Remote parts are listed for the 2008 Hummer H3, from DORMAN and GM GENUINE. All of them fit every engine offered in the 2008 H3.

Listed part numbers: DORMAN 13740 and GM GENUINE 10335583.

This table covers the replacement shells for the key fob. Read more

One part is listed for the 2008 Hummer H3 — DORMAN 13643.

This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor. Read more

7 Speed Sensor parts for the 2008 Hummer H3 come from 5 brands — STANDARD MOTOR PRODUCTS, GPD, GM GENUINE and 2 other brands. The "Popular" part is GM GENUINE 19302667. Every part fits both the 3.7L L5 and the 5.3L V8.

The Economy section lists 2 options from GPD and STANDARD MOTOR PRODUCTS — the catalog's value-priced group. GPD 1815489 is listed in this group.

In the Standard Replacement grade, STANDARD MOTOR PRODUCTS, GM GENUINE, WELLS and 1 other brand supply 5 parts: built to original-equipment specification. A representative part number is GM GENUINE 19302667.

This group includes GM GENUINE 19302667, GPD 1815489 and STANDARD MOTOR PRODUCTS SC168T and the remaining parts above.

This table covers the seals at the Speed Sensor. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

GM GENUINE supplies both parts for the 2008 Hummer H3. All of them fit every engine offered in the 2008 H3.

This group includes GM GENUINE 24234215 and GM GENUINE 19133158.

This table covers the Starter bolts. Read more

2 Starter Bolt parts are listed for the 2008 Hummer H3, from DORMAN and GM GENUINE.

This group includes DORMAN 72004 and GM GENUINE 11610633.

This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

27 Starter Motor parts are listed for the 2008 Hummer H3, from ACDELCO, PURE ENERGY, REMY and 7 other brands. ACDELCO 3371138 carries the "Popular" badge. They are grouped as New and Remanufactured, with Remanufactured the largest group at 15 parts from ACDELCO, DENSO, FVP and 5 other brands.

This table covers the Starter Motor Heat shields. Typical signs include a bent shield rubbing a rotor, or rust-through that leaves the backing open. A rubbing shield will eat a new rotor. Straighten or replace it before the wheel goes back on. Read more

This group shows a single part: GM GENUINE 12668713.

This table covers the Wiring Harness clips. Read more

GM GENUINE supplies both parts for the 2008 Hummer H3. 1 part fits every engine; the other 1 is engine-specific.

This group includes GM GENUINE 15157936 and GM GENUINE 11569980.

This table covers the Yaw sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

2 Yaw Sensor parts for the 2008 Hummer H3 come from 2 brands — GM GENUINE and WELLS. Every part fits both the 3.7L L5 and the 5.3L V8.

This group includes GM GENUINE 25927021 and WELLS 5S12116.