GM has issued a stop sale action on three 2016 SUV models due to fuel economy ratings being misstated by 1 to 2 miles per gallon.

“GM discovered an inadvertent error which affected the fuel economy information on the fuel economy labels on the 2016 model-year Acadia, Enclave and Traverse,” GM spokesman Tom Wilkinson said in an e-mail. “The error caused the EPA estimated fuel economy to be listed on the window label as 1 to 2 mpg more than it should have been. GM is stopping sale of the affected models until a corrected label is printed and affixed.”

According to Wilkinson, The new mileage ratings for the SUVs’ 3.6-liter V-6 engines are 15 miles per gallon in the city and 22 mpg on the highway.  The corrected mileage for front-wheel drive is 18 mpg overall.  And all-wheel drive vehicles are at  15 mpg city, 22 mpg highway and 17 mpg overall .

GM states that they are contacting owners who have already purchased or leased the affected models informing them of the situation.

The company went on to say that the label misstatements, which Wilkinson has attributed to an error in data transmission, in no way effect the safety and operation of these vehicles. Wilkinson said dealers have 59,823 of the three models in stock, which they are working on getting relabeled and back on the market.

This is where this story should end.

Consumer Reports  decided to dig a little deeper…

When they compared the test data of affected SUVs’ with the fuel economy numbers reported by the EPA, it was noted that previous model years for the Enclave, Traverse and Acadia as well as the discontinued Saturn Outlook may have also had incorrect fuel-economy estimates.

Consumer Reports asked GM whether other models or model years were affected by the labeling error and a GM spokesperson said the automaker “has checked and found no other model years were affected.”

An EPA spokesperson stated that the agency was looking into the matter.

To be continued.