what causes my 5.3l to idle rev fast and then drop real low

What is your question?

On cold starts the engine rev up high and drop very low.

What makes this problem better or worse?

worse in cold starts and cold weather

How long has your 1999 GMC Sierra 1500 had this problem?

month ago

Visitor

in Kingsport TN

Jan 6, 2021

1 Reply

What are the best GMC repair shops?

RepairPal Certified shops can diagnose and repair your 1999 GMC Sierra 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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1 Reply

Tuffy Tire & Auto Service Center - Grandview

4.7

(85)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Wed

Call

Excite Auto Repair & Towing

4.4

(15)

5.94 mi

3430 Westerville Road

Columbus, OH

Closed

Opens 9:00 AM Wed

Call

All In Auto Service

4.8

(27)

6.56 mi

5200 Fisher Road

Columbus, OH

Closed

Opens 8:00 AM Wed

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Tuffy Tire & Auto Service - Grove City

4.4

(522)

6.67 mi

2131 Stringtown Rd

Grove City, OH

Closed

Opens 7:30 AM Wed

Call

Blackstone Complete Auto Care

4.2

(37)

6.77 mi

4800 Sinclair Road

Columbus, OH

Closed

Opens 9:00 AM Wed

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Boyd's Tire & Service - Columbus

4.7

(185)

7.23 mi

5263 Godown Rd

Columbus, OH

Closed

Opens 8:00 AM Wed

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See All 30 Locations

Tuffy Tire & Auto Service Center - Grandview

4.7

(85)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Wed

Call