2020 Chevrolet Blazer Electrical Parts

This table covers the Active Noise Cancellation modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2020 Chevrolet Blazer — GM GENUINE 85144751.

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 2020 Chevrolet Blazer come from 8 brands — GM GENUINE, WAI GLOBAL, PURE ENERGY and 5 other brands. The "Popular" part is GM GENUINE 13553838.

The New section lists 6 options from GM GENUINE, WAI GLOBAL, SKP and 1 other brand — brand-new units rather than rebuilt ones. GM GENUINE 13553838 is listed in this group.

The Remanufactured section lists 7 options from PURE ENERGY, REMY, TERREPOWER and 1 other brand — factory-rebuilt units with new wear components. FAMOUS BRAND 10350A is listed in this group.

This table covers the Alternator / Generator bolts. Read more

One part is listed for the 2020 Chevrolet Blazer — GM GENUINE 11589253.

This table covers the pulleys on the alternator shaft. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

5 Alternator / Generator Pulley parts are listed for the 2020 Chevrolet Blazer, from LITENS, CONTINENTAL and DORMAN. LITENS 920060A carries the "Popular" badge.

Part numbers include LITENS 920060A, CONTINENTAL 49966 and CONTINENTAL 49968, among others listed above.

This table covers the Antenna modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2020 Chevrolet Blazer — GM GENUINE 85774230.

This table covers the Anti-Theft control modules. Read more

One part is listed for the 2020 Chevrolet Blazer — GM GENUINE 13540633.

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

10 Battery parts are listed for the 2020 Chevrolet Blazer, from DEKA, ACDELCO, BOSCH and 5 other brands. DEKA 9A48 carries the "Popular" badge.

The AGM (Extended Life) section lists 9 options from DEKA, ACDELCO, BOSCH and 4 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A48 is listed in this group.

The Performance AGM (Extended Life + Increased Power) section lists 1 option from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT85094R is listed in this group.

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 2020 Chevrolet Blazer come from 2 brands — GM GENUINE and ACDELCO.

Listed part numbers: ACDELCO 84072193, GM GENUINE 84620571 and GM GENUINE 84681646, plus the other parts above.

This table covers the Battery Cable Terminal ends. Read more

One part is listed for the 2020 Chevrolet Blazer — GM GENUINE 84710785.

This table covers the Battery Current 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

This group shows a single part: STANDARD MOTOR PRODUCTS BSC123.

This table covers the Battery 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 84155667.

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

This group shows a single part: GM GENUINE 11588713.

This table covers the Battery Terminal Bolt nuts. Read more

This group shows a single part: GM GENUINE 11610091.

This table covers the Blind Spot Detection 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 Blind Spot Detection Sensor parts for the 2020 Chevrolet Blazer come from HELLA.

This group includes HELLA 013068241 and HELLA 013068041.

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

2 Body Control Module (BCM) parts for the 2020 Chevrolet Blazer come from GM GENUINE.

Listed part numbers: GM GENUINE 22940857 and GM GENUINE 13534192.

This table covers the resettable circuit breakers in this vehicle's electrical system. Read more

3 Circuit Breaker parts are listed for the 2020 Chevrolet Blazer, from GM GENUINE and BUSSMANN.

Part numbers include BUSSMANN CB21220, GM GENUINE 84098783 and GM GENUINE 84098784.

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

This group shows a single part: GM GENUINE 12725663.

This table covers the brackets that mount the Engine Control Module (ECM Computer). Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: GM GENUINE 84672986.

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

43 Fuse parts are listed for the 2020 Chevrolet Blazer, from GM GENUINE, BUSSMANN and ACDELCO. GM GENUINE 15305191 carries the "Popular" badge. They are grouped as 10 Amp, 100 Amp, 125 Amp, 15 Amp, 150 Amp, 175 Amp, 2 Amp, 20 Amp, 225 Amp, 25 Amp, 250 Amp, 3 Amp, 30 Amp, 300 Amp, 350 Amp, 4 Amp, 40 Amp, 450 Amp, 5 Amp, 50 Amp, 60 Amp, 7.5 Amp and 70 Amp, with 25 Amp the largest group at 5 parts from ACDELCO, BUSSMANN and GM GENUINE.

This table covers the Hands Free Vehicle Access modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

This group shows a single part: GM GENUINE 23275430.

This table covers the brackets that mount the Hands Free Vehicle Access Module. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: GM GENUINE 42485326.

This table covers the Hands Free Vehicle Access 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 Hands Free Vehicle Access Sensor parts for the 2020 Chevrolet Blazer come from GM GENUINE.

Part numbers include GM GENUINE 23366531 and GM GENUINE 23366530.

This table covers the HID Lighting ballasts. Read more

2 HID Lighting Ballast parts for the 2020 Chevrolet Blazer come from 2 brands — DORMAN and ULTRA-POWER.

Listed part numbers: DORMAN 601066, plus the other parts above.

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

8 Horn parts are listed for the 2020 Chevrolet Blazer, from FIAMM and GM GENUINE. FIAMM 72112 carries the "Popular" badge.

In the Accessory Replacement grade, FIAMM supplies 5 parts: grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. A representative part number is FIAMM 72112.

The Standard Replacement section lists 3 options from FIAMM and GM GENUINE — built to original-equipment specification. FIAMM 7421122 is listed in this group.

Listed part numbers: FIAMM 72112, FIAMM 7410024 and FIAMM 6602023, plus the other parts above.

This table covers the receivers that pick up the key-fob unlock signal. Read more

3 Keyless Entry Module / Receiver parts for the 2020 Chevrolet Blazer come from GM GENUINE.

This group includes GM GENUINE 13540045, GM GENUINE 13558723 and GM GENUINE 13558725.

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

5 Keyless Entry Remote parts for the 2020 Chevrolet Blazer come from 2 brands — GM GENUINE and DORMAN. The "Popular" part is GM GENUINE 13529636.

Part numbers include GM GENUINE 13529636, DORMAN 99476ST and DORMAN 99746ST, among others listed above.

This table covers the ultrasonic park-aid sensors in the bumper. 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

6 Parking Aid Sensor parts for the 2020 Chevrolet Blazer come from 4 brands — TECHPRO, BOSCH, GM GENUINE and 1 other brand. The "Popular" part is BOSCH F00E270754.

This group includes BOSCH F00E270754, GM GENUINE 84586217 and TECHPRO GM1175107 and the remaining parts above.

This table covers the totally-integrated power modules that distribute body electrical power. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

GM GENUINE supplies the 4 Power Supply Module (TIPM) parts for the 2020 Chevrolet Blazer.

Listed part numbers: GM GENUINE 13438997, GM GENUINE 13510484 and GM GENUINE 23158670, plus the other parts above.

This table covers the Serial Data Gateway modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

This group shows a single part: GM GENUINE 13534928.

This table covers the Side Object Sensor modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

2 Side Object Sensor Module parts for the 2020 Chevrolet Blazer come from GM GENUINE.

Part numbers include GM GENUINE 84729107 and GM GENUINE 84729106.

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

5 Speed Sensor parts are listed for the 2020 Chevrolet Blazer, from GM GENUINE, STANDARD MOTOR PRODUCTS and DELPHI. GM GENUINE 24295280 carries the "Popular" badge.

This group includes GM GENUINE 24295280, DELPHI SS12406 and GM GENUINE 24298199 and the remaining parts above.

This table covers the Speed Sensor Reluctor rings. Read more

GM GENUINE supplies both parts for the 2020 Chevrolet Blazer.

This group includes GM GENUINE 24230744 and GM GENUINE 24061032.

This table covers the Starter bolts. Read more

2 Starter Bolt parts for the 2020 Chevrolet Blazer come from GM GENUINE.

This group includes GM GENUINE 11588740 and GM GENUINE 11588726.

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

8 Starter Motor parts for the 2020 Chevrolet Blazer come from 8 brands — GM GENUINE, TYC, BOSCH and 5 other brands. The "Popular" part is GM GENUINE 12667973.

The New section: 4 options from GM GENUINE, TYC, BOSCH and 1 other brand. GM GENUINE 12667973 is listed in this group.

The Remanufactured section: 4 options from FVP, PURE ENERGY, REMY and 1 other brand. FVP 12457 is listed in this group.

This group includes GM GENUINE 12667973, TYC 116349 and BOSCH SR8505N and the remaining parts above.

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 2020 Chevrolet Blazer — GM GENUINE 12654121.

This table covers the Video control modules. Read more

This group shows a single part: GM GENUINE 86532507.