This story was updated at 4:15 p.m. EST.

AP Auto Writer

NEW YORK -- General Motors ( GM) said Friday it will temporarily close 20 factories across North America and make sweeping cuts to its vehicle production as it tries to adjust to dramatically weaker automobile demand.

GM said it will cut 250,000 vehicles from its production schedule for the first quarter of 2009, which includes a cut of 60,000 vehicles announced last week. Normal production would be around 750,000 cars and trucks for the quarter, spokesman Tony Sapienza said.

Many plants will be shut down for the whole month of January, he said, and all told, the factories will be closed for 30% of the quarter.

"We're adjusting pretty dramatically," spokesman Chris Lee said.

The move affects most of GM's plants in the U.S., Canada and Mexico. During the shutdowns, employees will be temporarily laid off and can apply to receive a portion of their normal pay from the company. They can also apply for state unemployment benefits, Lee said.

GM and nearly all automakers who sell in the U.S. are mired in the worst sales slump in 26 years. GM reported its sales in the U.S. plunged 41% in November and are down 22% for the first 11 months of the year compared with the same period last year.

Cash-strapped GM is seeking government loans to stay in operation beyond the end of the year. The White House said Friday it may tap into its $700 billion Wall Street bailout fund to help GM and Chrysler stay in business after the Senate blocked a measure to provide $14 billion in immediate loans.

The measure failed in dramatic fashion late Thursday after Senate Republicans balked at passing the bill without more wage and benefit concessions from autoworkers.

Lee said Friday's production cuts are unrelated to the rescue's failure and had already been planned.

The entire auto industry has been making massive production cuts recently as it adjusts to the reality of lower automobile demand. Earlier Friday, Honda Motor Co. said it was cutting production in North America by 119,000 vehicles for its fiscal year ending March 31.

That brings Honda's expected production for its fiscal year to 1.3 million units, a spokesman said.

Auto demand in the U.S., and increasingly around the world, has been hobbled due to the declining economy and the credit squeeze, which has made it more difficult and more costly for some buyers to obtain financing. Industrywide vehicle sales crumbled 37% in November, with every major automaker posting giant sales declines.

Lee said GM's production cuts will be achieved by adding "down weeks" to the schedules at the affected plants. During down weeks, which can be staggered during a given period of time or can come several at once, the plant will not produce anything and employees will be temporary laid off.

"We look at it on a plant-by-plant basis and make decisions regarding their production schedule in terms of market demand, so it's not a blanket ... we look at it plant by plant and make those decisions," Lee said.

The following are the plants affected and what they produce. U.S.

-- Fort Wayne (Ind.): Chevy Silverado, GMC Sierra Light Duty Regular and Extended Cab

-- Flint Assembly (Mich.): Chevy Silverado, GMC Sierra Heavy Duty Regular and Crew Cab and Medium Duty

-- Wentzville (Mo.): Chevy Express, GMC Savanna

-- Lansing Delta Township (Mich.): Buick Enclave, GMC Acadia, Saturn Outlook

-- Pontiac Assembly (Mich.): Chevy Silverado, GMC Sierra Heavy Duty Extended Cab

-- Spring Hill (Tenn.): Chevy Traverse

-- Fairfax Assembly (Kan.): Chevrolet Malibu/Hybrid, Saturn Aura/Hybrid

-- Arlington Assembly (Texas): Full Size SUVs: Chevy Suburban, Tahoe and Tahoe Hybrid, GMC Yukon, Yukon XL and Yukon Hybrid, Cadillac Escalade/Escalade ESV and Escalade Hybrid

-- Lansing Grand River (Mich.): Cadillac STS and CTS

-- Orion (Mich.): Chevy Malibu, Pontiac G6

-- Detroit-Hamtramck (Mich.): Buick Lucerne, Cadillac DTS

-- Shreveport (La.): Chevy Colorado, GMC Canyon, Hummer H3 and H3T

-- Bowling Green (Ky.): Chevy Corvette, Cadillac XLR

-- Wilmington (Del.): Pontiac Solstice, Saturn Sky, Opel GT Canada:

-- Oshawa Consolidated (Ontario): Chevy Impala

-- Oshawa Truck (Ontario): Chevy Silverado, GMC Sierra Light Duty Extended and Crew Cab

-- CAMI (Ingersoll, Ontario): Chevy Equinox, Pontiac Torrent Mexico:

-- Silao: Chevy Silverado, GMC Sierra Light Duty Crew Cab, Chevy Avalanche, Cadillac Escalade EXT

-- Ramos 2: Chevy HHR, Saturn VUE, Chevy Captiva

-- San Luis Potosi: Chevy Aveo, Pontiac G3

Copyright 2008 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

More from Stocks

Dow Futures Tank as Trade War Fears Grip Wall Street

Dow Futures Tank as Trade War Fears Grip Wall Street

Why GE's Stock Has Fallen 9% in the Last 30 Days

Why GE's Stock Has Fallen 9% in the Last 30 Days

5 Stock Picks Under $10 for Millennials

5 Stock Picks Under $10 for Millennials

3 Complicated Investing Strategies Millennials Love

3 Complicated Investing Strategies Millennials Love

Tyson Foods CEO: We Aren't Done Making Deals

Tyson Foods CEO: We Aren't Done Making Deals