2004 Hummer H2 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

13 Alternator / Generator parts for the 2004 Hummer H2 come from 9 brands — REMY, FVP, TERREPOWER and 6 other brands. The "Popular" part is REMY 91653.

The New section lists 7 options from REMY, TYC, FVP and 4 other brands — brand-new units rather than rebuilt ones. REMY 91653 is listed in this group.

The Remanufactured section lists 6 options from GM GENUINE, FVP, PURE ENERGY and 3 other brands — factory-rebuilt units with new wear components. GM GENUINE 3212128 is listed in this group.

This table covers the Alternator / Generator stators. Read more

One part is listed for the 2004 Hummer H2 — BOSCH 1986AE0694.

This table covers the Alternator rotors. Typical signs include shudder under braking, or a lip at the outer edge. Do not put new pads on a rotor that is below minimum thickness. Read more

This group shows a single part: BOSCH 1986AE0669.

This table covers the Automatic Headlamp 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 Automatic Headlamp Sensor parts are listed for the 2004 Hummer H2, from GM GENUINE and STANDARD MOTOR PRODUCTS.

This group includes GM GENUINE 13498958 and STANDARD MOTOR PRODUCTS EFL172.

This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early. Read more

5 Battery Cable parts for the 2004 Hummer H2 come from 3 brands — STANDARD MOTOR PRODUCTS, ACDELCO and GM GENUINE. The "Popular" part is ACDELCO 2SD79CX.

Listed part numbers: ACDELCO 2SD79CX, GM GENUINE 6EG21 and STANDARD MOTOR PRODUCTS A118L, plus the other parts above.

This table covers the Battery Cable Junction blocks. Read more

One part is listed for the 2004 Hummer H2 — GM GENUINE 12191376.

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

This group shows a single part: DORMAN 390030.

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

One part is listed for the 2004 Hummer H2 — DEKA 00351.

This table covers the covers that protect battery terminals. Read more

3 Battery Terminal Protector parts are listed for the 2004 Hummer H2, from GM GENUINE and DORMAN.

Part numbers include DORMAN 60300, GM GENUINE 12010050 and GM GENUINE 19119011.

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

2 Engine Control Module (ECM Computer) parts for the 2004 Hummer H2 come from 2 brands — ACDELCO and GM GENUINE.

Listed part numbers: ACDELCO 21812735 and GM GENUINE 19299226.

This table covers the Engine Control Module (ECM Computer) bolts. Read more

One part is listed for the 2004 Hummer H2 — DORMAN 700251.

This table covers the flasher units that blink the turn signals and hazards. Read more

5 Flasher parts are listed for the 2004 Hummer H2, from TRIDON / NOVITA, GM GENUINE, HOLSTEIN and 2 other brands. TRIDON / NOVITA LM487 carries the "Popular" badge.

Part numbers include TRIDON / NOVITA LM487, GM GENUINE 10383321 and HOLSTEIN 2RSW0003, among others listed above.

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

29 Fuse parts are listed for the 2004 Hummer H2, from BUSSMANN and LITTELFUSE. BUSSMANN ATM10 carries the "Popular" badge. 10 Amp, 15 Amp, 20 Amp, 25 Amp, 30 Amp, 40 Amp, 50 Amp and 60 Amp are all represented, and 30 Amp alone accounts for 6 parts.

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

GM GENUINE supplies both parts for the 2004 Hummer H2.

Part numbers include GM GENUINE 84594590 and GM GENUINE 84594588.

This table covers the horn contacts in the steering column. Read more

One part is listed for the 2004 Hummer H2 — DORMAN 924088.

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

10 Speed Sensor parts are listed for the 2004 Hummer H2, from STANDARD MOTOR PRODUCTS, AUTOTECNICA, GPD and 6 other brands. GM GENUINE 19302667 carries the "Popular" badge.

In the Economy grade, AUTOTECNICA, GPD, SKP and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is AUTOTECNICA GM1320218.

The Standard Replacement section lists 6 options from GM GENUINE, WELLS, DELPHI and 3 other brands — built to original-equipment specification. GM GENUINE 19302667 is listed in this group.

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

This group shows a single part: GM GENUINE 19133158.

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

15 Starter Motor parts for the 2004 Hummer H2 come from 9 brands — PURE ENERGY, WAI GLOBAL, ACDELCO and 6 other brands. The "Popular" part is PURE ENERGY 6492SN.

The New section: 8 options from PURE ENERGY, WAI GLOBAL, ACDELCO and 5 other brands. PURE ENERGY 6492SN is listed in this group.

The Remanufactured section: 7 options from GM GENUINE, ACDELCO, FVP and 4 other brands. GM GENUINE 3231622 is listed in this group.

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

One part is listed for the 2004 Hummer H2 — GM GENUINE 12668713.