After installing one of these bulbs on the right rear assembly, I noticed the turn signal flashed much quicker. Is that normal?

This is caused by the led lamp voltage jump. Its a hyper flash. The only way to correct this is to install a resistor which you can find by googling hyper flash.

I have these bulbs in a 15 gmc sierra and get error code what needs to be done to fix this issue

These bulbs don’t draw much current and the computer thinks your light has burned out. They make special ballast resistors that you wire in parallel to the LED to increase the current draw. But that defeats the purpose of the LED on the first place: low current. Maybe GM has a better solution. I’d call them. I had the same issue on my motorcycle: plus a “fast flash” warning. I just learned to live with it

Will this work with my 2021 Chevrolet Tahoe premier? Without errors on the dashboard?

I can only tell you that I installed mine in a 2020 jeep gladiator without any fault errors. The made a drastic improvement over the stock bulb.

please mention how many is in this pack?

There are 2 bulbs in the pack. One for each side. Theses are great reverse lights.

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Description

🚗 Brighten your ride, save energy, and never miss a turn!

BUILT TO LAST - Advanced electroplated housing and intelligent IC driver reduce heat and prevent oxidation for extended bulb lifespan.
PLUG PLAY UPGRADE - Non-polarity design fits a wide range of 7440/7443/7444 sockets for effortless installation without modifications.
ILLUMINATE EVERY ANGLE - 360° full-angle 6000K Xenon white light ensures crystal-clear visibility when reversing or signaling.
POWER MEETS EFFICIENCY - Consumes only 5.5W per bulb—quarter the energy of halogen counterparts—while delivering 4x the brightness.
VERSATILE COMPATIBILITY - Perfect replacement for reverse, brake, parking, and DRL lights across multiple vehicle models—stay ahead on the road.

The AUXITO Upgraded 7440/7443 LED bulbs feature 54 high-power 4014-SMD LEDs delivering 1300 lumens of crisp 6000K white light with 360° coverage. Drawing just 5.5W, they are four times brighter and more energy-efficient than standard halogen bulbs. Equipped with a smart IC driver and electroplated housing, these bulbs ensure stable performance, reduced heat, and longer lifespan. Designed for easy plug-and-play installation, they fit a wide range of automotive sockets and serve as ideal replacements for reverse, brake, parking, and DRL lights.

Specifications

Manufacturer	AUXITO
Brand	AUXITO
Model	992, 7440, 7441, 7443, 7442, 7444, W21W, WY21W, 7440NA, 7440NAK, 7444NA,7444NAK, 7443LL.etc.
Product Dimensions	5.59 x 2.01 x 1.6 cm; 39.69 g
Item model number	7443-54H-DD-W2
Exterior	Electroplating process
Manufacturer Part Number	AUXITO-US54H7443W2-240111
OEM Part Number	992, 7440, 7441, 7443, 7442, 7444, W21W, WY21W, 7440NA, etc.
Position	Rear
Bulb Type	Halogen, LED, Xenon
Mirror Lighting Type	automotive-exterior-brake-light-bulbs, automotive-exterior-turn-signal-light-bulbs
Voltage	12 Volts (DC)
Wattage	5.5 watts
Item Weight	39.6 g

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