NHTSA ID Number: 10205597
Manufacturer Communication Number: 21NA281
Summary
This service bulletin provides diagnostic information for technicians in cases of an ETRS system fault or a no start condition – If the vehicle needs to be moved, it is recommended to use wheel dollies, tire skates or the NEW Manual Park Release tool DT-52910.
Condition
Certain service procedures or scenarios may require the transmission
to be shifted into Neutral so that the vehicle can be moved or to complete a repair.
Diagnostic Information
Vehicles equipped with an internal Electronic Transmission Range Select (ETRS) system require hydraulic pressure to disengage the park mechanism. Please follow the information listed below when trying to place the transmission into Neutral.
Correction
In cases where the engine can be started – Refer to the Neutral Service Mode document in SI.
In cases of an ETRS system fault or a no start condition – If the vehicle needs to be moved, it is recommended to use wheel dollies, tire skates (example shown above) or the NEW Manual Park Release tool DT-52910 shown above (1). The manual park release tool is available through the GM Special Service Tools website. This new tool will allow the transmission to be manually shifted to neutral, see example SI doc ID 5620825. The manual park release tool can be installed to temporarily shift the vehicle into Neutral when the engine is not running.
Warning: The transmission will be placed in N (Neutral) when the manual park release is pulled. The vehicle can roll on you or others could be injured. Ensure the vehicle is on level ground, parking brake applied, and wheels blocked prior to installation of the manual park release.
Warning: If fuel system is opened the fuel pump should be disabled using the Fuel Pressure Relief, Alternate Method by the removing the B+ fuel pump control module fuse. Using the Fuel Pressure Relief, Scan Tool Method will allow the fuel pump to build pressure if the ignition is placed to run. See Fuel Pressure Relief in Service Information for complete instructions.
Caution: If the manual park release is pulled while the vehicle is on or if the ignition is turned on while the manual park release is pulled, the DIC will display a message to service the transmission.
Caution: The latching mechanism in the manual park release lever will release if the vehicle is started and placed in Park. An attempt to override this function or use of an un-approved tool may cause internal damage to the transmission.
16 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CADILLAC | CT4 | 2021-2022 |
| CADILLAC | CT5 | 2021-2022 |
| CADILLAC | ESCALADE | 2021-2022 |
| CADILLAC | ESCALADE ESV | 2021-2022 |
| CHEVROLET | SUBURBAN | 2021-2022 |
| CHEVROLET | TAHOE | 2021-2022 |
| GMC | YUKON | 2021-2022 |
| GMC | YUKON XL | 2021-2022 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-281
Date: December, 2021
NHTSA ID Number: 10179632
Manufacturer Communication Number: PIT5764
Summary
This Preliminary information communicates how to shift the transmission into neutral for various service procedures.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5764
Published date: 08/11/2020
MC-10179632-9999.pdf 145.057KB
- Reliable and Long-lasting: Crafted from one-piece thickened steel panels, our car moving dolly boasts remarkable strength and sturdiness. The reinforced steel platform can effortlessly carry weighing up to 1,500 lbs, and 6,000 lbs (4-piece). No need to worry about bending or damage, even when dealing with heavy SUVs.
- Versatile Performance: The wheel dolly cart allows you to effortlessly move vehicles, change tires, and perform various maintenance tasks. Designed to accommodate tire widths of up to 12" (305 mm), the car dolly is compatible with a wide range of vehicles, including family cars, large SUVs, pickups, ATVs, tractors, and more. No matter the task at hand, this car wheel dolly has got you covered.
- Easy Maneuverability: Equipped with 3-inch rolling bearing universal casters and locking casters, the car dolly cart ensures smooth and secure movement. You have complete control over the direction and positioning of your vehicle. The foot brake lets you instantly lock the dolly, providing convenience and security during maintenance work.
- Maximized Safety: The concave platform features dense diamond patterns that perfectly fit and grip vehicle tires, significantly increasing friction and minimizing the risk of falls or slips. This design maximizes both your safety and the protection of your vehicle.
- User-Friendly Designs: Using the car moving dolly is a breeze. Lift the car tire with a jack, position the wheel dolly underneath, and lock the wheel in place. Repeat the simple process for each tire, and within approximately 10 minutes, you'll be ready to go. No assistance from others is required. The handle design makes it convenient to hang in your garage or carry in your trunk, providing easy storage and portability.
- 🚗[THICKER STEEL PLATFORM]-The thicker steel platform makes DEXSO's car tire wheel dollies less prone to deformation and damage during the execution of tasks, and we use 30% more material than other dollies.
- 🚗[LARGE WEIGHT CAPACITY]-Each DEXSO car dolly is able to support up to 1500 lbs. (6000 lbs. In total); This set of 4 tire skates make moving vehicles of medium and heavy wheels a breeze (SUVs)
- 🚗[ANTISKID & RECESSED DESIGN]-The car wheel mover feature a steel plate with antiskid raised pattern that increase friction and prevent slip; Its recessed center works for balance and keeps the auto tire securely in place.
- 🚗[UNIVERSAL WHEELS & HANDLE]-4 swivel casters(2 for quick-stop) allow for mobility in all directions, which is suitable for single-person work. You can even rotate your car 180 degrees on flat ground.A convenient handle makes it easy for carrying or hanging.
- 🚗[MULTIPLE FUNCTIONS] -Not just for your car, DEXSO wheel dollies are useful for shops, garages, showrooms, and restoration for cars, trucks, trailers, tractors, ATVs, motorcycles, lawnmowers, furniture, equipment.
- 【Professional Automotive Structural Steel Plate】 Crafted from T500 high-tensile structural steel, this car dolly offers exceptional sturdiness and high yield strength. The steel plate, combined with reinforced rib design, enables KEDSUM’s car wheel dolly to effortlessly support up to 6000 lbs (4-piece set). It resists deformation and damage during tasks, ensuring a longer service life
- 【3-Inch Heavy-Duty Casters】 Equipped with four ball-bearing swivel casters (two with brakes), this car dolly ensures smooth and effortless movement during transportation. Engage the brakes when stationary for added safety and convenience during maintenance. The heavy-duty hard wheels enhance load capacity, stability, wear resistance, and durability
- 【Integrated Wheels and Steel Plate】 The wheels and steel plate feature an integrated design with tight connections, ensuring weight is evenly distributed across all four wheels during transportation. This effectively reduces localized stress and significantly enhances the dollies' durability and service life
- 【No Assembly + Easy Portability】This 4-piece car dolly comes fully assembled—no need to install wheels or accessories. Ready to use right out of the box, it saves you time. Measuring 16.3"" x 11.8"" and weighing approximately 39 lbs（4 pieces）. Car moving dolly features specifically designed hollow hand grips for easy lifting and storage in the car
- 【Versatile Applications】 Ideal for sedans, sports cars, convertibles, pickup trucks, SUVs, and motorcycles. This car dolly set simplifies moving vehicles, changing tires, and performing various maintenance tasks with ease
- Reliable and Long-lasting: Crafted from one-piece thickened steel panels, our car moving dolly boasts remarkable strength and sturdiness. The reinforced steel platform can effortlessly carry weighing up to 1,500 lbs, and 3,000 lbs (2-piece). No need to worry about bending or damage, even when dealing with heavy SUVs.
- Versatile Performance: The wheel dolly cart allows you to effortlessly move vehicles, change tires, and perform various maintenance tasks. Designed to accommodate tire widths of up to 12" (305 mm), the car dolly is compatible with a wide range of vehicles, including family cars, large SUVs, pickups, ATVs, tractors, and more. No matter the task at hand, this wheel dolly has got you covered.
- Easy Maneuverability: Equipped with 3-inch rolling bearing universal casters and locking casters, the cart dolly cart ensures smooth and secure movement. You have complete control over the direction and positioning of your vehicle. The foot brake lets you instantly lock the dolly, providing convenience and security during maintenance work.
- Maximized Safety: The concave platform features dense diamond patterns that perfectly fit and grip vehicle tires, significantly increasing friction and minimizing the risk of falls or slips. This design maximizes both your safety and the protection of your vehicle.
- User-Friendly Designs: Using the car moving dolly is a breeze. Lift the car tire with a jack, position the wheel dolly underneath, and lock the wheel in place. Repeat the simple process for each tire, and within approximately 10 minutes, you'll be ready to go. No assistance from others is required. The handle design makes it convenient to hang in your garage or carry in your trunk, providing easy storage and portability.
- HEAVY DUTY: Made of high-quality steel, it features durable and sturdy construction. Powder-coated finish prevents rust. Weight Capacity: 1,500 pounds per dolly. Acommodates wheel sizes up to 12 inches wide.
- MECHANICAL: Jack handle provides plenty of leverage. A simple and efficient method of moving a disabled vehicle around a shop environment. Ratcheting design is maintenance free and lighter than hydraulic one.
- FREE ASSEMBLY & EASY TO USE: Ready to use when you receive. Feature a pedal and built-in jack that raises the vehicle, so you don't need a separate jack. Foot pedal ratchet system frees your hand for positioning and making safe adjustments.
- 360°SWIVELING CASTERS: Coming with heavy-duty 4-inch ball-bearing casters, allows moving in any direction. You can even spin the vehicle in a tight circle. Within minutes, one individual can easily move the vehicle throughout the garage while protecting the floor from damage.
- PORTABLE & SAFE: The clever self-loading wheel dolly features a convenient carry handle. Aluminium twin rollers secure tire and ensure support. WARRANTY: 12 months. This 4-piece set is divided into 2 separate packages (2 pieces per box) for safe delivery.
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ulletin
Bulletin No.: 21-NA-281 INFORMATION Subject: Diagnostic Tip – Transmission Neutral Service Mode
Date: December, 2021 This bulletin replaces PIT5764B. Please discard PIT5764B.
Brand:
Model:
VIN:
ne: from to from to
Transmission: (Automatic)
4 Chevrolet GMC CT5
Escalade Models
Suburban Tahoe
Yukon Models
RPO MQA RPO MHS RPOs MHS, MQC Involved Region or Country Condition Diagnostic Information North America
Certain service procedures or scenarios may require the transmission to be shifted into Neutral so that the vehicle can be moved or to complete a repair.
Vehicles equipped with an internal Electronic Transmission Range Select (ETRS) system require hydraulic pressure to disengage the park mechanism. Please follow the information listed below when trying to place the transmission into Neutral.
Correction In cases where the engine can be started – Refer to the Neutral Service Mode document in SI (example Document ID # 5286309).
5641294 Page 2 December, 2021 Bulletin No.: 21-NA-281
5710077
In cases of an ETRS system fault or a no start condition
– If the vehicle needs to be moved, it is recommended to use wheel dollies, tire skates (example shown above) or the NEW Manual Park Release tool
DT-52910 shown above (1). The manual park release tool is available through the GM Special Service Tools website. This new tool will allow the transmission to be manually shifted to neutral, see example SI doc ID 5620825. The manual park release tool can be installed to temporarily shift the vehicle into Neutral when the engine is not running.
Warning: The transmission will be placed in
N (Neutral) when the manual park release is pulled. The vehicle can roll on you or others could be injured. Ensure the vehicle is on level ground, parking brake applied, and wheels blocked prior to installation of the manual park release.
Warning: If fuel system is opened the fuel pump should be disabled using the Fuel Pressure Relief, Alternate Method by the removing the B+ fuel pump control module fuse. Using the Fuel Pressure Relief, Scan Tool Method will allow the fuel pump to build pressure if the ignition is placed to run. See Fuel Pressure Relief in Service Information for complete instructions.
Caution: If the manual park release is pulled while the vehicle is on or if the ignition is turned on while the manual park release is pulled, the DIC will display a message to service the transmission.
Caution: The latching mechanism in the manual park release lever will release if the vehicle is started and placed in Park. An attempt to override this function or use of an un-approved tool may cause internal damage to the transmission.
Version 1 Modified Released November 30, 2021 Additional SI Keywords: tow, towing, haul, wrecker, truck
GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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