Vehicle incentive levels rose yet again in July, marking a new record-high for Detroit’s Big Three, which spent an average of $3,631 on spiffs during the month.

Fullsize SUVs, such as the Suburban, show highest increase in incentives in July.

That’s in stark contrast to the European nameplates, which doled out an average $1,873 per vehicle, the Koreans ($1,447) and the Japanese ($1,075), according to

In its True Cost of Incentives monthly report, Edmunds says that of the domestic manufacturers, General Motors Corp. spent the most on incentives, an average of $3,969 per unit, up 7% from June levels. That helped it to boost market share 1.2 percentage points during the month to 29.7%, slightly below its 30% goal.

Ford Motor Co. saw average incentive spending climb 3.8% to $3,377 per unit. But the company’s market share still declined, falling to 18.1% during the month.

Chrysler Group remained at the bottom of the pack, with incentive spending down 9.2% to $3,172 per unit. Chrysler saw its market share shrink 1.7 points to 11.8%.

On a segment basis, large SUVs posted the highest incentive levels for the month at $4,045 per vehicle, while large-car incentive spending averaged $3,595 per unit. Large trucks tallied $3,459 per unit, while luxury SUVs averaged $1,525 per vehicle and luxury sports cars hit $1,797 per unit. The segment with the least incentives was sports cars, where spiffs were limited to $1,263 per vehicle.