Subject: Overlapping Wiper Blades
Model and Year: 1959 Passenger Cars - 2-Speed Windshield Wipers
Source: Chevrolet Technical Service Bulletin
Bulletin No: DR #399
Section: I
Date: February 3, 1959
TO: ALL CHEVROLET DEALERS
To increase the wiping area of two-speed windshield wipers used optionally on 1959 Passenger Cars, new type, longer wiper arms are now in production. the longer arms result in over-lapping of the wiper blades in the "park" position.
To prevent interference between the blades, the wiper arms should be positioned as follows:
With arms and blades removed, operate wiper motor through several cycles, then turn switch "off". This places motor in park position.
Install right hand arm and blade with rubber element of blade parallel to and about 1/2" below the edge of windshield rubber weatherstrip.
Install left hand arm assembly with blade overlapping and just above the right blade.
Lift blades into place on windshield glass and operate wipers. If blade interference is noted, position left or right arm up or down one serration as required.
The long arms are not used with the single speed windshield wiper as overloading and possible motor failure would result.
Replacement parts information will be released in the usual manner by the Parts Department.
E.L. Harrig
Article ID: 1001
Created: November 17, 2014
Last Updated: November 17, 2014
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1959-corvette-service-bulletin-overlapping-wiper-blades-1001.html