Rear AC Heater Blower Motor Fan 700101 Fit for Silverado Sierra H2

In this review of the 700101 Rear AC Heater Blower Motor Fan, the bottom line is simple: it is a practical, affordable OEM-style replacement for owners of late 2000s GM full-size trucks and Hummer H2 who need reliable cabin airflow. The reviewer found the unit offers improved durability and quieter operation compared with many aftermarket alternatives thanks to a premium motor and sturdy ABS and metal construction, and it restores strong blowing capacity for both heating and air conditioning systems.

Key Features

• Direct fitment: Fits a wide range of GM models so installation is straightforward for Cadillac Escalade EXT, Chevrolet Avalanche and Silverado, GMC Sierra, and Hummer H2 owners within the stated years.
• Robust materials: Built from high-quality ABS and metal, the housing and fan components resist wear and help the unit last longer in vehicle HVAC systems.
• Upgraded motor: The premium motor design reduces interference and is intended for a longer lifespan and quieter operation during normal use.
• Dual function airflow: Delivers fast blowing of cold air from the evaporator or warm air from the heater core, improving ventilation and heating response.
• OE interchange: Matches OEM numbers such as 700101, 88986838, 89019320 and others for straightforward replacement and compatibility with existing mounts and connectors.

Who It's For

This blower motor is aimed at owners and mechanics who need a direct replacement for rear HVAC blower failures in compatible GM trucks and SUVs from roughly 2003 through 2007, including Escalade EXT, Avalanche, Silverado, Sierra, and Hummer H2 models. It is especially useful for those who want an affordable part that restores strong cabin airflow and expects reasonable longevity from ABS and metal construction.

It is not intended for vehicles outside the listed fitment years or models, and drivers seeking a premium factory-branded dealer part or a blower with confirmed noise isolation beyond typical aftermarket upgrades should consider dealer options or higher-end specialty units.

Pros & Cons

Pros

• Good OEM fitment across many GM full-size trucks and SUVs, making replacement straightforward.
• Durable materials and an upgraded motor provide improved lifespan over basic aftermarket units.
• Strong blowing capacity quickly restores ventilation and heating performance.

Cons

• Noise reports are mixed; some users find it quieter than factory, while others note audible operation under load.

Specifications

Our Verdict

The 700101 Rear AC Heater Blower Motor Fan is a practical replacement for owners of the specified GM trucks and Hummer H2 who need to restore reliable cabin airflow at a reasonable cost. It pairs durable materials with an upgraded motor to improve longevity and performance, making it a good value for do-it-yourself replacements and independent shops, though buyers should be aware noise can vary by installation and vehicle.

Frequently Asked Questions

Will this blower fit my Silverado?
Check the model year and variant; it fits many Silverado 1500/2500/3500 and classic HD models from 2003 through 2007 as listed in the fitment information.

Is the motor quieter than stock?
The upgraded motor is designed for quieter operation, but customer reports are mixed and some installations may still produce noticeable noise.

Does it require any modification to install?
It is intended as a direct interchange with OEM numbers provided, so most installations require no modification when matched to the correct vehicle fitment.