DETROIT and AUBURN HILLS, Mich. -

As Chrysler announced two recalls covering more than 800,000 units, General Motors made six additional recalls on Wednesday, raising its total for the year to 60 campaigns connected with more than 28 million vehicles worldwide.

The newest GM campaigns cover 717,950 recent model vehicles in the U.S. Here is a breakdown of units included in the latest development from the automaker:

— 414,333 units including the Chevrolet Camaro from the 2011 and 2012 model years, the Chevrolet Equinox and GMC Terrain from the 2010 through 2012 model years, the Buick Regal and LaCrosse from the 2011 and 2012 model years and the Cadillac SRX from the 2010 and 2012 model years. All of the units in this campaign are equipped with power height adjustable driver or front passenger seat structures.

GM explained the bolt that secures the height adjuster actuator may become loose or fall out.

“If the bolt falls out, the seat will move up and down freely because it is no longer attached at the height adjuster,” OEM officials said. “The vehicles are safe to drive, but customers should not use the power height adjustable feature until dealers can replace the height adjuster bolt.”

GM acknowledged that it is aware of one crash and three injuries but no fatalities related to this condition.

— 124,008 units including the 2014 Chevrolet Caprice, the 2014 Chevrolet SS, the Chevrolet Silverado LD and HD from the 2014 and 2015 model years, the Cadillac ATS from the 2013 and 2014 model years, the 2014 Cadillac CTS, the 2014 Cadillac ELR, the Buick Encore from the 2013 and 2014 model years, and the GMC Sierra LD and HD from the 2014 and 2015 model years.

The automaker indicated this recall stems from certain vehicles possibly having an incomplete weld on the seat hook bracket assembly.

“A loss of power to a laser welding machine may have resulted in an incomplete weld, according to data collected from the machine between July 2013 and January 2014,” officials said.

GM said franchised dealers will inspect the weld. If it is sufficient, no further action is necessary. If it is insufficient, dealers will replace the lower seat track at no charge.

Officials projected that less than 1 percent of welds are expected to require seat track replacement. GM added that it’s unaware of any crashes or injuries as a result of this issue.

— 120,426 units including the Buick Regal from the 2011 through 2013 model years and the 2013 Chevrolet Malibu. The units associated with this recall are equipped with front turn signals that use two bulbs in each front turn signal.

“While the driver would get a rapidly flashing turn signal arrow in the instrument cluster if both bulbs in one turn signal were burned out; if only one bulb on either side burns out, there would be no signal to the driver,” the automaker said.

GM indicated dealers will reprogram the body control module to fix the condition. The OEM insisted it knows of no crashes, injuries or complaints related to this issue.

— 57,242 units including the 2014 Chevrolet Impala equipped with belt-drive electric power steering.

On certain vehicles, GM explained customers may experience reduced or no power steering assist at start-up or while driving due to a poor electrical ground connection to the power steering control module.

“If power steering is lost, a warning message is displayed on the Driver Information Center and a chime sounds,” GM said. “Steering control can be maintained because the vehicle will revert to manual steering mode, but would require greater driver effort particularly at low vehicle speeds.”

The automaker contends that paint may have seeped behind the nut on the power steering control module ground stud. GM has told dealers to inspect and clean paint from behind the ground nut, re-torque the nut and update the power steering control module software at no charge.

GM acknowledged that it’s aware of one crash but no injuries or fatalities related to this condition.

— 1,919: including the Chevrolet Spark from the 2014 and 2015 model years that were imported from Korea.

The OEM noted these vehicles were assembled with a lower control arm bolt not fastened to specification.

“The condition could result in noise from the front suspension and separation of the lower control arm from the steering knuckle while driving resulting in loss of steering control,” officials said.

The OEM said dealers will inspect the left and right hand lower control arm attaching bolts to assure they are tightened to specification. The automaker knows of no crashes, injuries or fatalities related to this condition. 

— 22: Chevrolet Tahoe/Suburban and GMC Yukon/Yukon Denali from the 2015 model year.

In these vehicles, GM indicated the roof carriers may have been attached with the wrong retaining nuts, resulting in holes or tears in the roof rail air bags if they deploy.

The automaker determined eight of these vehicles currently are in dealer stock and will be repaired before being sold.

After sharing details of all this recalls, GM vice president of global vehicle safety Jeff Boyer said, “These recalls signify how we’ve enhanced our approach to safety.

“We are bringing greater rigor and discipline to our analysis and decision making. If we identify an issue — large or small — that might affect the safety of our customers, we will act decisively,” Boyer went on to say.

Two Newest Chrysler Recalls

Chrysler Group officials said this week they will recall an undetermined number of older-model SUVs in connection with an investigation of ignition-switch performance.

The OEM said the precise number of affected vehicles will be determined by the investigation.

Approximately 792,300 are implicated — 649,900 in the U.S.; 28,800 in Canada; 12,800 in Mexico and 100,800 outside of the NAFTA region.

“Engineers are working to develop a remedy, and Chrysler is committing now to conduct a recall out of an abundance of caution,” officials said.

Chrysler is unaware of any related injuries. The company is aware of a single reported accident and a relatively small number of complaints involving 0.015 percent of the subject vehicle population.

Officials explained that the preliminary investigation suggests an outside force — usually attributed to contact with the driver’s knee — may move ignition keys from the “on” position in certain Jeep Commander vehicles from the 2006 and 2007 model years and Jeep Grand Cherokee vehicle from the 2005 through 2007 model years.

“Such an occurrence may cause engine stall, reducing braking power and making steering more difficult. Safety features such as frontal airbags may also be disabled,” Chrysler said.

The automaker expects to identify affected customers and advise them by mid-September when they may schedule service, the cost of which will be borne by Chrysler.

“This timing complies with regulations governing recalls and owner notification,” officials said.

Chrysler pointed out the Commander is no longer in production, and the Grand Cherokee has since been completely redesigned so newer models are not subject to the recall.

The automaker recommended that owners of vehicles associated with this campaign are advised to assure there is clearance between their knees and the keys.

“As a further precaution, they are advised to remove all items from their key rings, leaving only their ignition keys,” the OEM said.

On a much smaller scale, Chrysler also is recalling an estimated 21,000 vehicles to inspect and, if necessary, replace the shocks and/or struts.

Chrysler explained that it’s staging the campaign to identify vehicles that may have been assembled using a shipment of shocks and struts that do not meet the company’s quality standards.

“Accordingly, the components may break free from their mounts, which could potentially lead to reduced shock damping and possible loss of vehicle control,” the automaker said.

Chrysler added that the issue was identified by a supplier and the OEM is unaware of any related injuries, accidents or complaints.

Affected are certain 2014 Ram 1500 pickups, 2015 Jeep Cherokee SUVs and 2015 Chrysler 200 sedans assembled within a 16-day period ending June 6.

An estimated 14,300 vehicles are in the U.S.; 5,300 are in Canada; 160 are in the Mexico and 2,000 are outside the NAFTA region.

Chrysler said it will contact affected customers and advise them when service is available. All costs related to the campaign will be borne by the company.

If vehicle owners have questions about either campaign, they can call Chrysler’s Customer Information Center at (800) 853-1403.