(Adds details, updates stock price, analyst comment)
DETROIT, Oct 12 (Reuters) - General Motors Co plans to scale back production at an assembly plant in Detroit and lay off about 1,500 workers, the Wall Street Journal reported on Thursday, citing sources familiar with the plan.
The No. 1 U.S. carmaker plans to shut the Detroit-Hamtramck factory for about six weeks from mid-November and cut production by roughly 20 percent once operations resume, the Journal reported.
The move will cost about 200 workers their jobs, the newspaper said. (http://on.wsj.com/2yiJWSh)
General Motors declined to comment.
The Hamtramck plant makes four sedan models that have not been performing well. They include the Buick LaCrosse, sales of which are down 21.5 percent year to date, and the Chevrolet Impala, which is down 31.8 percent.
Both GM and rival Ford Motor Co have struggled for most of this year to rein in high inventories of passenger cars as consumers have shifted to buying pickup trucks and sport utility vehicles.
"This is consistent with our view that domestic (manufacturers) continue to face steep competition in the passenger car segment and production must be aligned with waning sales in order to reduce the elevated amounts of inventory," Buckingham Research Group analyst Joseph Amaturo wrote in a client note about the Hamtramck news.
Earlier this year, GM eliminated the plant's second shift, saying it was laying off around 1,200 workers.
GM has reduced the number of shifts at five of its plants and several other facilities. The automaker announced last month that it would cut the third shift at its plant in Spring Hill, Tennessee, as of late November.
A GM spokesman said there are no plans to reinstate any of those shifts at this time.
Although the shifts GM has eliminated so far employed 6,000 hourly and salaried workers, the actual layoffs have been smaller. A spokesman said the company has let go 2,300 temporary workers and 800 of its hourly, union-represented workers have been laid off, giving a total of 3,100 job cuts so far.
GM has found alternative work for 2,900 affected hourly workers. More than half the 680 workers on the Spring Hill shift that will be eliminated are hourly workers and a GM spokesman said the company is trying to find work for them.
Production cuts slice into revenue but also could help automakers avoid deeper price cuts on vehicles they can sell.
General Motors shares were down 1.7 percent at $44.70 in morning trading. (Reporting by Nick Carey in Detroit and Rachit Vats in Bengaluru; Editing by Savio D'Souza and Bill Trott)