2020 Chevrolet Blazer Electrical Bulb & Socket Parts

This table covers the bulbs in the reverse lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

4 Back Up / Reverse Lamp Bulb parts for the 2020 Chevrolet Blazer come from 2 brands — WAGNER and GM GENUINE.

In the Extended Life grade, WAGNER supplies 1 part: grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. A representative part number is WAGNER 921LL.

The LED (instant-on, long life, energy-saving) section lists 1 option from WAGNER — grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. WAGNER 921WLED is listed in this group.

In the Standard Replacement grade, GM GENUINE and WAGNER supply 2 parts: built to original-equipment specification. A representative part number is GM GENUINE 13503360.

Part numbers include WAGNER 921LL, WAGNER 921WLED and GM GENUINE 13503360, among others listed above.

This table covers the bulbs in the stop lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

4 Brake Light Bulb parts for the 2020 Chevrolet Blazer come from 3 brands — WAGNER, PHILIPS and GM GENUINE.

Extended Life: 1 part, from WAGNER. A representative part number is WAGNER 7440LL.

The LED (instant-on, long life, energy-saving) section: 1 option from PHILIPS. PHILIPS 7440RLED is listed in this group.

Standard Replacement: 2 parts, from GM GENUINE and WAGNER. A representative part number is GM GENUINE 13596816.

Part numbers include WAGNER 7440LL, PHILIPS 7440RLED and GM GENUINE 13596816, among others listed above.

This table covers the bulbs that light the headlamps. Typical signs include a dark lamp, a flicker over bumps, or a bulb that keeps failing on one side. Avoid touching a halogen capsule. Repeated failure in one socket is usually the socket or ground, not the bulb. Read more

8 Headlamp Bulb parts are listed for the 2020 Chevrolet Blazer, from SYLVANIA, AUTOTECNICA, WAGNER and 4 other brands. AUTOTECNICA D3S carries the "Popular" badge.

Listed part numbers: AUTOTECNICA D3S and GM GENUINE 13587843, plus the other parts above.

This table covers the bulbs that light the license plate. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

7 License Plate Lamp Bulb parts for the 2020 Chevrolet Blazer come from 2 brands — SYLVANIA and HELLA. The "Popular" part is HELLA 194.

Extended Life: 2 parts, from HELLA and SYLVANIA. A representative part number is HELLA 194LL.

In the Extra Bright (improved visibility, but shorter life) grade, SYLVANIA supplies 1 part: grouped under the catalog's "Extra Bright (improved visibility, but shorter life)" designation — the notes column spells out what sets them apart. A representative part number is SYLVANIA 194ST.

The LED (instant-on, long life, energy-saving) section: 2 options from SYLVANIA. SYLVANIA 194BSL is listed in this group.

Standard Replacement: 2 parts, from HELLA and SYLVANIA. A representative part number is HELLA 194.

Part numbers include HELLA 194, HELLA 194LL and SYLVANIA 194ST, among others listed above.

This table covers the bulbs in the parking lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

4 Parking Lamp Bulb parts are listed for the 2020 Chevrolet Blazer, from WAGNER, PHILIPS and SYLVANIA.

The Extended Life section: 3 options from PHILIPS, SYLVANIA and WAGNER. PHILIPS 7444NALL is listed in this group.

The Standard Replacement section: 1 option from WAGNER. WAGNER 7444NA is listed in this group.

Listed part numbers: PHILIPS 7444NALL, plus the other parts above.

This table covers the bulbs in the side-marker lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

9 Side Marker Light Bulb parts for the 2020 Chevrolet Blazer come from 3 brands — SYLVANIA, HELLA and GM GENUINE. The "Popular" part is HELLA 194.

Extended Life: 2 parts, from HELLA and SYLVANIA. A representative part number is HELLA 194LL.

Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 194ST.

The LED (instant-on, long life, energy-saving) section: 2 options from SYLVANIA. SYLVANIA 194BSL is listed in this group.

Standard Replacement: 4 parts, from GM GENUINE, HELLA and SYLVANIA. A representative part number is HELLA 194.

This group includes HELLA 194, HELLA 194LL and SYLVANIA 194ST and the remaining parts above.

This table covers the bulbs in the tail lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

One part is listed for the 2020 Chevrolet Blazer — HELLA 7440.

This table covers the Tail Lamp Socket / Connector plates. Typical signs include warpage, cracks, or a plate that no longer locates the assembly. Confirm which plate the notes describe — backing plates, clutch plates and strike plates are different parts. Read more

GM GENUINE supplies both parts for the 2020 Chevrolet Blazer.

Listed part numbers: GM GENUINE 84308389 and GM GENUINE 84308390.

This table covers the bulbs in the trunk or cargo-area lamp. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

One part is listed for the 2020 Chevrolet Blazer — GM GENUINE 13569063.

This table covers the bulbs in the turn-signal lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

9 Turn Signal Lamp Bulb parts for the 2020 Chevrolet Blazer come from 5 brands — SYLVANIA, WAGNER, PHILIPS and 2 other brands. The "Popular" part is PHILIPS 7444NALL.

Extended Life: 4 parts, from SYLVANIA, PHILIPS and WAGNER. A representative part number is PHILIPS 7444NALL.

Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 7440ST.

Standard Replacement: 4 parts, from GM GENUINE, HELLA, SYLVANIA and 1 other brand. A representative part number is GM GENUINE 13579188.

Listed part numbers: PHILIPS 7444NALL and SYLVANIA 7440LL, plus the other parts above.

This table covers the sockets that hold a Turn Signal Lamp bulb. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket. Read more

This group shows a single part: GM GENUINE 84987048.

This table covers the replacement bulbs for the Vanity Mirror / Sun Visor Light. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

One part is listed for the 2020 Chevrolet Blazer — GM GENUINE 13502343.