| October 30, 2018

Following the success of the Chevrolet Volt, GM launched the Bolt in 2017. The Bolt is a technology-rich, plug-in electric vehicle (EV).

Powered by a lithium-ion battery, the Bolt is a true EV. The Bolt has two unique technologies to assist in regenerative braking, helping to minimize range anxiety. The first is what Chevrolet calls One Pedal Driving. When driving in Low mode (GM’s regenerative braking mode), the driver can slow down, or come to a complete stop, by lifting his or her foot off of the accelerator, with no conventional braking required.

The second technology is what GM calls Regen on Demand. (You should always use your brake pedal if you need to stop quickly.) To leverage this technology, the driver pulls on a paddle behind the steering wheel. Once engaged, the system will slow down the vehicle and convert energy into electricity that is transferred back to the battery. Chevrolet cautions that this system isn’t available in cold weather or when the battery is at, or near, full charge.

The Bolt is available with a number of Advanced Driver Assistance Systems
(ADAS), including Lane Keep Assist with Lane Departure Warning*, Low-Speed Forward Automatic Braking*, Forward Collision Alert* and Front Pedestrian Braking*. Following repairs to many of these systems, calibration or aiming may be required. To determine when calibration is required, I-CAR Gold Class businesses and I-CAR Platinum™ individuals can refer to I-CAR’s OEM Calibration Requirements Search tool. For the calibration procedure, access to GM Service Information is required.

Spot welds, MIG brazed joints, plug welds, adhesives, and rivets . . . What do all of these attachment methods have in common?

All of them are required for Chevrolet Bolt collision repairs in order to achieve complete repairs. Often, several of these will be required for the replacement of a single assembly. For the exact locations of each attachment method, the body repair manual is required. If it’s been awhile since you referred to one of the newer GM body repair manuals, one thing you’ll quickly notice is the enhancements that have been made to them. GM has had some of the best collision repair information available, but the new, detailed illustrations have taken the information to the next level.

Although there are no sectioning procedures for the front rails on the Bolt, there are sectioning procedures for the side and rear of the vehicle. Depending on the procedure, a combination of spot welds, plug welds and adhesives are required for the sectioning joints. One thing that all of the sectioning procedures have in common is that each of them call for an open butt-joint, MIG brazed seam at the cutline location. If you’re unfamiliar with the MIG brazing process, I-CAR offers an in-shop, hands-on skills development course on MIG Brazing.

*Read the vehicle owner’s manual for important safety or driver assistance feature limitations and information. 

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Category: The Technical Side, Trainers Corner