#MidsizeTrucks

General Motors’ return to the midsize truck segment has done wonders for the automaker and the market, but skeptics aren’t sure how long that will last.

The rapid ascent of the new Chevrolet Colorado finally slowed in March 2015 with month-to-month growth amounting to only 58 extra sales. Colorado volume has increased every month since the new truck arrived last fall, from 1491 units in its first full month of October to 6621 units in March.

But even with an overall pickup truck market that was 17% larger in March than in February, Colorado sales grew by just 0.9% during the same period.

Its twin, meanwhile, didn’t sell as often in March as it did in February, sliding from 2513 sales two months ago to 2434 last month.

General Motors has reported 28,218 sales of their new midsize trucks since the Chevrolet Colorado and GMC Canyon arrived late in September 2014. Sales of both trucks have increased every month since arriving at dealers. Colorado volume in February was 177% stronger than it was in November; Canyon sales shot up 194% during the same period.

Neither GM pickup is the top-selling non-full-size truck in America, however, nor can GM yet claim the title when their sales are combined. Since October, sales of the top-selling Toyota Tacoma have increased 10% to 64,093 units.

Although General Motors’ full-size truck twins failed to outsell the Ford F-Serie s in January 2015, GM still came out on top as the best-selling truck manufacturer in America last month.

In the previous five months, the Chevrolet Silverado and GMC Sierra had accomplished this feat on their own, outselling the F-Series by 939 units in August 2014, 7076 in September, 2120 in October, 6294 in November, and 6918 units in December 2014. (The F-Series outsold the Silverado/Sierra by 12,263 units in calendar year 2014 and the total GM pickup truck family by 1045 units.)

• Colorado/Canyon sales steadily rising

• 14 of GM pickup sales generated by midsize trucks

• Still not approaching historic levels

Fast forward to January, when pickup truck volume jumped 22% year-over-year and the F-Series’ core F-150 line became more available in new aluminum-intensive form, and GM’s bigger set of twins fell 5643 sales short of overtaking the F-Series for a sixth consecutive month. But viewed as a full-line pickup truck manufacturer, GM’s 42% YOY improvement to nearly 57,000 sales was more than enough to fend off Ranger-less Ford.

The Chevrolet Colorado and GMC Canyon combined to own 31.8% of the small/midsize U.S. pickup truck market in January 2015, up from near nonexistence one year ago.

This meant the class-leading Toyota Tacoma saw its market share plunge by more than 17 percentage points.

Yet Tacoma sales increased in January, rising 1567 units, or 16%, to 11,409 units, 3262 more than the Colorado and Canyon managed.

Since the new GM trucks became readily available in November, and in the lead-up to the debut of a refreshed 2016 Tacoma, sales of Toyota’s sub-Tundra truck have jumped 10%.

General Motors’ U.S. market share in the small/midsize truck category grew in December 2014 to 21.1% from 13.9% in November. According to inventory statistics from Automotive News, GM dealers had approximately 9400 Chevrolet Colorados and GMC Canyons in stock at the beginning of December.

• Tacoma and Frontier rising

• GM earning market share

• Small/midsize trucks account for 1/10 pickup sales

Yet a booming auto industry and a surging pickup market meant that even with this new level of competition from the GM midsize pickups, widely regarded as the modern members of the class, the Toyota Tacoma and Nissan Frontier each posted 12% year-over-year improvements in December.

U.S. sales of small/midsize/non-full-size pickup trucks jumped 19.4% in October 2014, a gain of 3672 units compared with October 2013.

Sales of the Toyota Tacoma were up 5%. Nissan Frontier sales shot up 25%. Not surprisingly, the slowly disappearing Honda Ridgeline was down 35%. GM’s new pickup trucks contributed an extra 2158 sales. Even without those additional Colorados and Canyons, the category would have risen 8% despite the Ridgeline’s sharp but relatively inconsequential decline.

The Amarok may not be coming to the United States, but depending on the success of the General Motors’ twin midsize pickups, Volkswagen may re-enter the light-duty truck market with a product more suited to a U.S. audience.

Though Honda’s foray into Truck Mountain was met with slow sales, the automaker is standing behind the Ridgeline with plans for a second generation to make its ascent in two years’ time.